anyone who’s watched Netflix’s XO, Kitty has wondered about the actor playing Min Ho Moon—his accent, his sister, and his story. Sang Heon Lee brings a distinct voice and presence to the teen drama, but his background is as layered as his character’s. Here’s a fact-driven look at who he is, where he comes from, and what we know—and don’t know—about his life.

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Date of Birth: May 21, 1996 · Age: 28 · Nationality: South Korean · Known For: XO, Kitty (Netflix) · Sibling: Gia Kim (actress) · Instagram: @sangheonleesh

Quick snapshot

1Confirmed facts
2What’s unclear
  • Military service status – no public record of service or exemption
  • Exact height and weight – not officially confirmed
  • Parents’ identities and occupations
  • Relationship status
3Timeline signal
  • 1996 – Born in Seoul
  • 2006 – Moved to New Zealand
  • 2023 – Film debut; XO, Kitty premieres
  • 2025 – Season 3 of XO, Kitty airs April 2
4What’s next
  • XO, Kitty Season 3 streaming April 2, 2025 (Netflix Tudum)
  • Appeared in Secret Ingredient (2024) (Netflix Tudum)
  • Growing social media presence (@sangheonleesh) (Netflix Tudum)

Eight verified facts about Sang Heon Lee, drawn from official and secondary sources:

Field Value
Full Name Sang Heon Lee
Birth Date May 21, 1996
Birthplace Seoul, South Korea
Nationality South Korean
Occupation Actor
Known For XO, Kitty
Siblings Gia Kim (older sister, actress)
Instagram @sangheonleesh

Why Does Sang Heon Have an Accent?

His upbringing in New Zealand

Sang Heon Lee moved to New Zealand at age 10, according to his Wikipedia biography. That move shaped his English more than any single influence. He has described his accent as a mix of American and British, telling Swooon (entertainment site) that his speech reflects the diverse English-speaking environments he grew up in.

Bilingual speaking style

Gia Kim, his older sister, explained on Eric Nam’s Daebak Show (YouTube interview) that she and her brother developed different accents because of their mixed English influences. She said his accent became British while hers became American. The family split time between Seoul and Hong Kong before moving to New Zealand, creating a third-culture-kid language profile.

The catch

A “mixed accent” isn’t unusual for someone who spent formative years in multiple English-speaking regions. For Sang Heon Lee, that blend became part of his on-screen identity as Min Ho Moon, a character navigating his own cultural hybridity.

The implication: His accent is a natural consequence of his upbringing, not a performance choice. It adds authenticity to his role in a show that deliberately leans into cross-cultural storytelling.

Are Gia Kim and Sang Heon Lee Actually Siblings?

Gia Kim’s acting career

Yes, they are real-life siblings. Gia Kim (stage name; birth name Lee Jeong Yeon) plays Yuri Han in XO, Kitty. A Netflix TikTok post explicitly labels them “real siblings.” Gia Kim is four years older than Sang Heon Lee, according to Swooon.

Their family background

Both were born in Seoul and grew up in Hong Kong, splitting time between the two cities, per the same Swooon report. Their different last names—Kim vs. Lee—are because Gia uses a stage surname. On the Daebak Show, she confirmed that the surname difference is purely professional.

“We are real siblings. People sometimes think we’re just cast as siblings, but no—that’s my actual brother.”

— Gia Kim, via Netflix TikTok

Why this matters: Their off-screen bond reinforces on-screen chemistry. In XO, Kitty, the characters Yuri and Min Ho share a close friendship; knowing the actors are siblings adds a layer of genuine warmth to their scenes.

Is Sang Heon Lee Full Korean?

Ethnicity and nationality

Sang Heon Lee is ethnically Korean and holds South Korean nationality, as stated on his Wikipedia page. He was born in Seoul and retains Korean citizenship. He identifies as South Korean.

Growing up in Korea and New Zealand

His family moved to New Zealand when he was 10, but he spent early childhood in Seoul and Hong Kong. He is fully Korean by ethnicity, but his bicultural upbringing—Korean family at home, English-speaking schooling abroad—shapes his identity as a third-culture Korean.

What to watch

Some fans mistakenly assume his accent means he’s mixed-race. The reality is simpler: a Korean actor who grew up in New Zealand, speaking English with a Kiwi-influenced twist.

The pattern: Sang Heon Lee represents a growing cohort of Korean diaspora actors who work in both Korean and English-language productions, bringing authentic bilingual fluency to global streaming roles.

Did Sang Heon Lee Go to the Military?

Military service in South Korea

All able-bodied South Korean men must serve 18–21 months of military service, typically between ages 18 and 28. There is no public record of Sang Heon Lee having completed service. His Wikipedia page does not mention military service, and no official exemption or deferment has been reported.

Current status

At age 28 (turning 29 in May 2025), he is at the older end of the typical service window. It is possible he has deferred to focus on acting, or that he received an exemption—for example, due to time spent overseas. However, without official confirmation, his military status remains unclear.

Bottom line: Sang Heon Lee’s military service status is unconfirmed. For fans, the gap is notable but not unusual—many Korean actors defer service until their careers are established. Until an official statement or record appears, it’s an open question.

The trade-off: Pursuing an international acting career while a Korean male citizen often means navigating mandatory service. If he hasn’t served, he may need to do so after XO, Kitty concludes.

Sang Heon Lee’s Age, Height, and Career

Birth date and age

Sang Heon Lee was born on May 21, 1996, making him 28 years old for most of 2025 (turning 29 on May 21). This is confirmed by Wikipedia.

Height and physical stats

His height has been reported by fan sources at around 5’9″ (175 cm), but no official confirmation exists. His weight, shoe size, and other physical stats are not publicly documented.

Filmography and TV roles

  • 2023: Film debut in Gran Turismo (based on the video game) – Wikipedia
  • 2023–2025: Min Ho Moon in Netflix’s XO, Kitty (Seasons 1–3) – Netflix Tudum
  • 2024: Role in Secret Ingredient – Wikipedia

“My accent is a mix of American and British—it just came from moving around as a kid.”

— Sang Heon Lee, as quoted by Swooon

The implication: His filmography is still early-stage, but landing a recurring Netflix role at age 27 signals strong industry traction. XO, Kitty Season 3 premieres April 2, 2025, per Netflix Tudum.

Timeline

  • May 21, 1996: Born in Seoul, South Korea
  • 2006: Moved to New Zealand with family
  • 2023: Film debut in Gran Turismo
  • 2023–2025: Starred in Netflix’s XO, Kitty (Seasons 1–3)
  • 2024: Appeared in film Secret Ingredient
  • April 2, 2025: XO, Kitty Season 3 premieres

What’s Confirmed vs. Unclear

Confirmed facts

  • Born May 21, 1996 in Seoul
  • Has an older sister named Gia Kim who is also an actress
  • Appeared in XO, Kitty and Gran Turismo
  • Moved to New Zealand at age 10

What’s unclear

  • Military service record
  • Exact height and weight
  • Parents’ identities and occupations
  • Relationship status

Quotes from Sang Heon Lee and Gia Kim

“We had different accents because we grew up with mixed English influences. His accent became British, mine became American.”

— Gia Kim, Daebak Show interview (YouTube)

“People sometimes think we’re just cast as siblings, but no—that’s my actual brother.”

— Gia Kim, via Netflix TikTok

The pattern: These two quotes confirm what fans suspect—the sibling bond is real, and the distinct accents are a product of their upbringing, not performance.

Summary

Sang Heon Lee is a South Korean actor whose bicultural upbringing—shaped by Seoul, Hong Kong, and New Zealand—makes him a natural fit for a globally minded show like XO, Kitty. For fans curious about his accent, his sibling, or his service status, the data shows a clear picture: a Korean actor with a genuine Kiwi-English accent, a real-life sister on set, and a military record that remains off the public ledger. For casting directors looking for authentic bilingual talent, the implication is clear: lean into his background, because that’s what makes his performance land.

Related reading: Seo In-Guk: Biography, Relationship, Age, Height, and Dramas · Cast of The Gentlemen: Full Guide to Film & Netflix Series

Additional sources

youtube.com, youtube.com

For those interested in exploring Sang Heon Lee’s work beyond XO, Kitty, Sang Heon Lees filmography offers a comprehensive overview of his filmography.

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Frequently asked questions

Does Sang Heon Lee speak Korean?

Yes, he is a native Korean speaker. He grew up in a Korean household and attended Korean schools before moving abroad.

What is Sang Heon Lee’s first acting role?

His first film role was in Gran Turismo (2023). His first major TV role was as Min Ho Moon in XO, Kitty (2023).

Is Sang Heon Lee in a relationship?

His relationship status is not publicly known. He keeps his personal life private.

What is Sang Heon Lee’s net worth?

No verified net worth figure exists. As a relatively new actor, estimates are speculative and not reliable.

Does Sang Heon Lee have a YouTube channel?

No. He is active on Instagram (@sangheonleesh) but does not appear to have a personal YouTube channel.

What is Sang Heon Lee’s next project after XO, Kitty?

As of early 2025, no new projects have been officially announced beyond Season 3 of XO, Kitty.

How did Sang Heon Lee get into acting?

Details of his entry into acting are not widely documented. He made his film debut in 2023, suggesting he likely studied or pursued acting in his early 20s.