The former Hannah Montana star turns 1...
And the Cyrus ladies were a huge hit at the bash after breaking out their best moves for a joint mum/daughter dance.
Speaking earlier in the evening, Miley told Access Hollywood, "I'm going out dancing later - we rented out a space so all my friends can come. Me and my mom actually have choreography for the night later - everyone loves when we dance in unison.
"We got a bunch of moves going on. Everyone goes wild when me and my mom have choreography, so it's going to be good... She is such a good dancer - she really gets it."
