The Emmy-winning beauty has been on a pretty good run as of late. She’s hooked up with boyfriend Justin Theroux, and has a new movie, Wanderlust, out later this month (Feb. 24). All in all, we couldn’t be happier for Jen!
Which is why we’re taking a look back at her hottest bikini looks through the years. Celebrate Jen’s big 4-3 by clicking through our gallery, then be sure to wish her a very happy birthday in the comments below!