Break out the party hats -- it’s Reese Witherspoon’s birthday, and we’re here to celebrate our very own national treasure!

Jeremy Renner and Robert Downey Jr. both starred together in last year's Avengers: Endgame Jeremy Renner celebrated his birthday with ... Thank you for the song and cake last night ...

The cake was also embellished with colorful candy ... "We're gonna pretend like it's still Feb 7th," Lively wrote as her sister's 49th birthday was on Sunday. The Age of Adaline star also shared ...

Actress Reese Witherspoon shared a makeup free photo just days after her 49th birthday ... offered up a smile as she sat behind a birthday cake — complete with one lit candle.