Matt Sayles / Invision/AP 1 / 15
Matt Sayles / Invision/AP 1 / 15

Mom is moonstruck by her dancing baby!

As anticipated, Cher was in the audience at Monday's "Dancing With the Stars" to cheer on her son, Chaz Bono.

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Flanked by other family members (her mother Georgia, her younger son Elijah Allman and Mary Bono, Chaz's stepmom and the widow of the late Sonny Bono), the Oscar and Grammy-winning star, 63, chatted up the famous family of another "DWTS" contestant: Courteney Cox and daughter Coco plus Rosanna and Patricia Arquette (all cheering on David Arquette, whom Cher called "darling").

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Beaming and watching intently throughout the night -- along with her mom and Mary Bono -- the "If I Could Turn Back Time" singer got emotional after her 41-year-old son (the show's first transgendered contestant) performed with Lacey Schwimmer. "She looked so proud!!" a witness says.

After the show, she lingered on set chatting with her family and other "DWTS" castmembers, and posed for pics with Chaz, Schwimmer and other family members.

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