It was a star-studded gathering for Christian's show at Top of the Rock in Manhattan on Saturday, February 9.
Mariska and Kelli sat among several other A-list actresses like Debra Messing and Danielle Brooks.
Other attendees included former Mad Men star Christina Hendricks and model Coco Rocha.
Kelli showed off her post-baby figure in a gorgeous green dress while posing for the camera.
Mariska, who just celebrated her 55th birthday on January 23, opted for a sparkly black number for Christian's show.
Whose ensemble did you like more: Mariska or Kelli's? Sound off in the comments!