Kristen Bell gives rare look at her and Dax Shepard's daughters while celebrating actor's 50th birthday

Image from Page Six

• The normally private couple gave fans a rare peek at their two daughters, Lincoln and Delta, in the heartwarming carousel of snaps
• Bell gushed over Shepard's 'strength, kindness and humor' as he hits the big 5-0, calling him her 'favorite human' and 'best friend'