Reese Witherspoon welcomed a new member to her picture-perfect family [2] and on Wednesday, she took to Instagram to share the exciting news. The actress posted a heartwarming snap of her new dog, LouAnn, writing, "Drum roll please!!!! Introducing the newest member to our family #LouAnn !! #bullterrier #madlyinlove (just look at that face *sigh*)." Reese and her family have had a lot to celebrate lately, including both Tennessee's 3rd birthday [3] and Ava's sweet 16 [4] in September. Take a look at LouAnn's social media debut above, then check out even more snaps of celebrities with their pets [5].