Kylie Jenner steps out rocking an Alexander Wang black dress, but little did we know she was prepping for her dad’s birthday lunch.

She shared her selfie with her dad, who is now Caitlyn Jenner, and she wished her a happy birthday. See Kylie’s posts below:

https://instagram.com/p/9WpFNTnGpk/?taken-by=kyliejenner

https://instagram.com/p/9WwUsuHGmw/?taken-by=kyliejenner