One of them is a Britpop rocker, and the other plays the television world's most famous time-travelling Doctor.
But Noel Gallagher and Matt Smith joined forces for a lads' night out on the town on Thursday evening as they hit London's swanky Groucho club.
Both seemed to be in great spirits as they emerged from the nightspot after an evening of partying, before hailing cabs and heading home.
Click here to see the pictures.