Last week was San Diego Comic Con, where Hollywood stars come to promote their big action and sci-fi blockbusters. Instagram was abuzz with photos of the casts of Marvel movie and TV franchises like The Avengers, Guardians of the Galaxy and Agents of S.H.I.E.L.D, plus the stars of Teen Wolf, Arrow and other fan favorites.

Teen Wolf's Tyler Hoechlin, Tyler Posey and Dylan Sprayberry ready for San Diego Comic Con

Avengers: Age of Ultron cast members Mark Ruffalo, Chris Evans, Robert Downey Jr, Chris Hemsworth, Cobie Smulders, Jeremy Renner, Paul Bettany and Aaron Taylor Johnson with producer Kevin Feig.

Ruffalo with Evans

With original Hulk, Lou Ferigno: "When Hulks collide! Lou Ferrigno and @MarkRuffalo have a SMASHing time at the #MarvelSDCC booth during the Marvel's #Avengers #AgeOfUltron cast signing. #SDCC"

Smulders meets Avengers comics writer Brian Michael Bendis, who created her character, Maria Hill

Agents of S.H.I.E.L.D. Ming Na Wen and Brett Dalton: "@MingNa and @IMBrettDalton at our #AgentsOfSHIELD signing! Hail Hydra...? #MarvelSDCC #SDCC"

Agent Coulson himself, Clark Gregg, comes face-to-face with Rocket Raccoon of Guardians of the Galaxy.

True Blood's Stephen Moyer takes a bite of of Rocket.

Colton Haynes selfies backstage before the Arrow panel, with Stephen Amell, David Ramsey, Willa Holland and John Barrowman

Kellan Lutz signing Expendables 3 posters

Paul Rudd at the Marvel booth for an Ant-Man signing.

Derek Theler

Chris Pratt at the Guardians Of The Galaxy premiere before SDCC

With Guardians co-stars Zoe Saldana and David Batista

With Batista and director James Gunn: "I am the meat in this glorious man sandwich. #DaveBautista is the bun and @jamesgunn is the pickle (For reasons I'm not comfortable explaining here) #GOTG #AKA #GUARDIANSOfTheGalaxy #ThreeMenAndaLittleMovie #dreamer #USA #weapons #drax #beautiful #ManHug #Embrace #MachoCuddle #DudeSqueeze #BroHug #bearhug #deathClutch #Wrestle"

The cast of Game of Thrones —including Kit Harington, Maisie Williams, Sophie Turner, Rory McCann, and Natalie Dormer—and creator George R.R. Martin  welcome Jonathan Pryce and Alexander Siddig to the GoT family

Flash star Grant Gustin with Jesse L. Martin and other castmates.

Zachary Quinto with Hannah Ware after the panel for Hitman: Agent 47