Vo filme Pevné puto hrajú Saoirse Ronan (Susie Salmon), Mark Wahlberg (Jack Salmon), Rachel Weisz (Abigail Salmon), Susan Sarandon (Grandma Lynn), Stanley Tucci (George Harvey), Rose McIver (Lindsey Salmon), Michael Imperioli (Len Fenerman), Carolyn Dando (Ruth Connors), Christian Ashdale (Buckley Salmon), Reece Ritchie (Ray Singh), Nikki SooHoo (Holly), Jake Abel (Brian Nelson), AJ Michalka (Clarissa), Tom McCarthy (Principal Caden), Stink Fisher (Mr. Connors), Evelyn Lennon (Susie Salmon (aged 3 years)), Andrew James Allen (Samuel Heckler), Stefania LaVie Owen (Flora Hernandez), Scott Evans (Townsperson), Catherine Corcoran (Murder Victim), Marley McKay (Nate), Ashley Brimfield (Teenage Girl in Parking Lot), John Jezior (Mr. O'Dwyer), Anna George (Mrs. Singh), Kirit Kapadia (Mr. Singh), Richard Lambeth (Deputy), Nick Baker (Deputy), William Zielinski (Deputy), Glen Drake (Deputy), Greg Wood (Hospital Doctor), Freya Milner (Jackie Meyer), Katie Jackson (Leah Fox), Bruce Phillips (Grandfather), Dan Kern (Hospital Doctor), Ruby Hudson (Lana Johnson), Tina Graham (Sophie Cichetti), Phoebe Gittins (Mr. Harvey's Victim), Anna Dawson (Mr. Harvey's Victim), Lili Bayliss (Mr. Harvey's Victim), Veronica Horn (Grace Tarking), Jack Hoffman (Fashion Show MC), David C. Roehm Sr. (Mr. Coleman (as David C. Roehm Sr)), Seth F. Miller (Soccer Coach), Lee Miller (Townsperson), Michael A. Salvato (Townsperson), Nakia Dillard (Townsperson), William Hummell (Townsperson), James Vassanelli (Townsperson), Billy Jackson (Mall Shopper), Bob Burns (Mall Shopper), Kathy Burns (Mall Shopper), April Phillips (Police Station Mother (as April Philips)), Grace Carden-Horton (Police Station Girl), Gabby Greig (Police Station Girl), Bravo (Holiday the Salmon family dog), Peter Jackson (Man at Pharmacy (uncredited)).