Sunny (써니) is a Korean-American singer under SM Entertainment. She is a member of the Korean pop girl group Girls' Generation. She was a radio DJ and hosted the "Reckless Radio" program with Super Junior's lead vocalist Sungmin; taking over after fellow member Sooyoung withdrew from the show. She was a regular cast member on the popular reality television program Invincible Youth and was the only original member to return for Invincible Youth 2.
- Stage Name: Sunny (써니)
- Birth Name: Lee Sunkyu (이순규)
- Nickname: DJ Soon, Sunny Bunny
- Birthdate: May 15, 1989
- Birthplace: Los Angeles, California, United States
- Blood Type: B
- Height: 155cm
- Weight: 44kg
- Religion: Christian
- Education: Baehwa All-Girls High School
- Languages: English (Fluent), Chinese (Basic), Japanese (Basic)
- Family: Uncle Lee Soo Man, founder of SM Entertainment
- Hobbies: Swimming, Video Games, Sports
- Interests: Music, Fashion, reading magazines, dancing, singing & shopping
- [2013.06.13] Yeowangui Gyosil (OST)
- [2014.11.20] First Kiss: Super Hero Series #3
- [2017.09.15] Jyae Boji Ma (U&I) (with Henry)
- [2008.06.05] Super Junior-Happy - Cooking? Cooking! (#1 Cooking? Cooking!)
- [2008.08.14] Working Mom OST (#2 Sarangeul Mollayo (Wang Ji Ta))
- [2009.03.05] Story of Wine OST (#2 Ijeseoya (Vocal Sunny of Girls' Generation))
- [2009.09.23] Heading to the Ground OST (#1 Sunny, Taeyeon - Sarangingeollyo)
- [2010.03.23] Oh! My Lady OST (#1 Geudae Inhyeong)
- [2012.02.01] Miryo - MIRYO aka JOHONEY (#3 Saranghae Saranghae (feat. Sunny))
- [2012.08.22] To the Beautiful You OST "It's Me" (#1 Sunny & Luna - Naya (It's Me))
- [2021.12.27] 2021 Winter SMTOWN : SMCU EXPRESS (#7 12wolui Insa (Goodbye), #10 Bich (Hope from KWANGYA))
-  Tae Hee, Hye Kyo, Ji Hyun (cameo)
- [2008 - 2009] Live Power Music
- [2009 - 2010] The M
- [2009.10.23 - 2010.06.11] Invincible Youth
- [2011.11.12 - Present] Invincible Youth 2
- [2012 - Present] Music Island
-  Super Junior-Happy - COOKING? COOKING!
- [2012.03.28 - 2012.06.10] Catch Me If You Can - Brenda
- [2008.02.03 - 2008.07.31] Reckless Radio - DJ
- Her favorite colors are yellow and pink.
- Her favorite food is Japanese ramen.
- Her favorite fashion is denim.
- Her motto is "Everyday Sunny Day".