The Pretty Little Liars star, who wore a Milly dress, Le Vian jewelry and Casadei heels, brought big sister Melissa (who is serving our country in the Army) as her date.
Keegan also stopped by the Backstage Creations Celebrity Retreat, who grabbed a Bop It! Smash pro game — promising to challenge Lucy Hale to a round on set.
FYI: Tyler is wearing the “Lennox L/S” shirt by Zanerobe.
15+ pics inside…