The actress' family and famous friends came out to celebrate the launch of her memoir, "Inside Out," on Monday evening, hours before the book became available for purchase.
Willis and Moore posed right next to each other alongside their daughters,Rumer, 31, Scout, 28, and Tallulah, 25.
Also, pictured in the family photo is Willis' wife of 10 years, Emma Heming.
It's interesting that the actor is supporting his ex-wife's tell-all considering she divulges some pretty heavy things about their former marriage.
In her book, she reveals that once she started having babies, Willis wasn't happy with how she balanced her career and family.
According to The Times, he thought her acting career took away from family time.
Moore also states that Willis is the one who wasn't happy in their marriage and reportedly told her he wasn’t sure if he wanted to be married.
Time heals all wounds because after divorcing in 2000, the famous former duo have figured out how to remain positive co-parents and friends.
Demi Moore's A-list family weren't the only celebrities there to show her support.
Her bestie, Gwyneth Paltrow, appeared to host the party and other friends like Kate Hudson, Liv Tyler, Melanie Griffith and Rachel Zoe were in attendance.
As The Blast reported, Moore drops several bombshells in "Inside Out" including being raped at 15 years old.
Willis isn't the only ex-husband she's spilling the tea about either.