The 'Avengers' cast best BFF moments

When it comes to box-office success, the “Avengers” movies deliver! But it’s not just its money-making power that has fans in awe; the cast has a real-life superhero bond that can’t be ignored. Robert Downey Jr., aka Iron Man, can’t keep his lips to himself when he’s around his actor pals. He’s kissed co-stars Gwyneth Paltrow, Chris Evans, Don Cheadle and Mark Ruffalo on the cheek — there’s no escaping RDJ’s PDA. Ruffalo, who plays the Hulk, has his own bromance with Thor himself, Chris Hemsworth. Watch out, Hulk! Chadwick Boseman (Black Panther) has a Thor-rific bond too. Zoe Saldana and Vin Diesel have a cozy co-star friendship after working together in two “Guardians of the Galaxy” movies. She’s even made Benedict Cumberbatch (Doctor Strange) her pal — and has the picture to prove it. Wow, Saldana must be really close with Cumberbatch, because he never takes selfies. Hey, it’s all for the ’gram, right?