17. Leonardo DiCaprio & Tobey Maguire

Leonardo DiCaprio & Tobey Maguire
These A-listers are close friends. Leonardo DiCaprio and Tobey Maguire met when they were 12 and are known to be one of the longest-lasting friendships of Hollywood. The two came from similar places in that they both had single mothers raising them, and they were both trying hard to make it as child actors in the Hollywood scene. The two made a lifelong bond that has not been shaken over the years either by fame, celebrity, or Hollywood, or anything else for that matter.
18. Sienna Miller & Keira Knightley

Sienna Miller Keira Knightley
Sienna Miller and Keira Knightley became friends in 2009 while they worked together on the movie The Edge of Love. This famous duo lived together according to Zimbio, and Sienna told of how the two actresses bonded over being total nerds. “We talk about some books and we play cards games and do The Guardian crossword,” Sienna said about Keira. “She is one of my favorite girls.” It’s been a long time since they became friends and it seems that they will be friends for life. It feels so good to witness such an amazing friendship in Hollywood.