Calvin Harris Is All Smiles Despite Feeling 'Betrayed' by Taylor Swift

Calvin Harris flashes a big smile while arriving at the gym for a morning workout on Thursday (June 16) in Beverly Hills, Calif.

The 32-year-old DJ and music star appeared in great spirits just one day after photos were revealed of his ex-girlfriend Taylor Swift getting steamy with new flame Tom Hiddleston.

Calvin reportedly feels “betrayed” as the romance was allegedly brewing while they were still together.

“Calvin was very suspicious that Taylor was cheating during their relationship. He just didn’t know with whom,” a source told E! News. “He feels like these pictures confirm his suspicions, and it changes everything. He is so angry and feels betrayed. He is convinced that Taylor was cheating with Tom while they were still together.”

FYI: Calvin is wearing Under Armour pants.

25+ pictures inside of Calvin Harris heading to the gym…