Leave it to America’s Sweetheart Jennifer Aniston to throw the most star-studded birthday party ever! Jen rang in her 50th birthday today, Monday, February 11, but she threw the biggest bash ever for nearly every celeb in Hollywood at Los Angeles’ Sunset Tower over the weekend on Saturday, February 9.

Gwyneth Paltrow, Reese Witherspoon, Kate Hudson and Barbra Streisand were just a few of the A-list stars invited to Jen’s fête but it was the arrival of the actress’ ex-husband Brad Pitt that really shocked the world. According to Us Weekly, the 55-year-old actor greeted Jen with a hug and a birthday card when he first got to the event and spent the rest of the night hanging with some of his friends inside.

To see all the stars who attended Jennifer’s birthday party, scroll down!