Main Characters:

Moon Chae Won • an actress that was well known. A mother to Jung Soo.

Moon Jung Soo • Chae Won's son.

Song Joong Ki • a successful actor who got married and divorced. Chae Won's ex lover.

Lee Sang Yoon as Lee Seung Joon • a doctor and a surgeon who happened to meet Chae Won from her accident. A father to Jung Soo.

Moon Geun Young and Han Hyo Joo • Chae Won's close friends.

Lee Kwang Soo • Joong Ki's close friend.

Other Characters:

Song Ha Jin (previously Hye Kyung) • an A list actress, ex-wife of Joong Ki.

Jo In Sunga and Lim Joo Hwan • Joong Ki's circle of friends.

Moon Ye Jun • Moon Chae Won's brother.

Song Sang Jun • Song Joong Ki's brother.

Special Mentions:

Wang Ji Won and Lee Seung Gi • Chae Won's other celebrity friends.

Cha Tae Hyun and Do Kyung Soo • Joong Ki's other friends.

Son Ye Jin • Chae Won's senior she used to be close with.

Award Night Mentions:

Lee Joon Gi • Chae Won's co-star.

Jeon Yeo Bin • Joong Ki's co-star.

Yoo Ah In • as Ha Jin's best friend and Joong Ki's old friend.

Yoo Jae Suk • nation's MC, a close senior to Joong Ki.