"So grateful to my friends, family and fans who were there today to support me as I received my [star]," the actress and director wrote.
Her "friends" were none other than Cameron Diaz, Demi Moore and Drew Barrymore, the former cast of the "Charlie's Angels" films.
"Charlie's Angels reunion!!! 20 years ago were were forming an elite crime fighting team. Thanks to @DrewBarrymore and @CameronDiaz for always being my angels!" she wrote alongside another pic of the three kick-butt women.
The films, based on the 1970s show, began in 2000 and had a successful sequel three years later.
Moore may have played Liu's on-screen rival, in real life, she's her biggest support.
"So incredibly honored to receive my star on the Hollywood Walk of Fame! Thank you to @moore2d and @perlmonster for being my cheerleaders and champions," Liu wrote.
Barrymore also posted about the big day, writing, "20 years of this tripod!!!!!!! We love each other and support each other. Always will. Congratulations to our girl and her star on the walk of fame."
Diaz added, "CONGRATS LUCY!! YOU TRULY ARE A [star]... LOVED HONORING YOU TODAY.... ANGELS FOREVER."
As reported last year, "Charlie's Angels" is getting a reboot, starring Kristen Stewart, Naomi Scott, and Ella Balinska, and directed by Elizabeth Banks. That film is expected later this year.