Jennifer Aniston's friendship with Courteney Cox gets all the attention, but she's just as cool with Rudd.
The two met as budding thespians in Los Angeles and then got to know each other better with 1998's "The Object of My Affection." By the time they got around to co-starring together again in 2012's "Wanderlust," Aniston and Rudd could call each other old friends.
Swift, left, is beloved by regular Joes and superstars alike.
One of her high-level supporters is Lena Dunham, who can often be found singing Swift's praises on Twitter.
We had no idea Meryl Streep and 50 Cent had a budding friendship until the rapper shared photos of himself hanging out with the Oscar winner at an NBA game between the Los Angeles Lakers and the New York Knicks.
They've been spotted catching a lunch here and there, too.
Hollywood hunks Jon Hamm, left, and Paul Rudd have a friendship that's lasted for years.
We couldn't tell you, because this superstar seems to be friendly with everyone famous, including Lorde. The pair go way back and enjoyed cooking together so much that they launched "Martha & Snoop's Potluck Dinner Party" on VH1 in 2016.
After the teen singer picked up two awards at the 2014 Grammys, Swift -- who didn't win that night -- shared a photo to let her fans know that she was fully supporting her friends. Jennifer Lawrence spilled the beans to the New York Times in 2015 that she and new friend Amy Schumer are writing a script together. " Nye, meanwhile, flashed his all-access pass and called Trainor "my (new) BFF."Sure, Jennifer Lopez and Leah Remini are both New Yorkers who are self-proclaimed tough girls, but we still wouldn't have necessarily pegged them as BFFs.