After keeping their relationship under wraps for a year, the costars put rumors to rest when they arrived hand-in-hand at the MuchMusic Video Awards Sunday night.
"Who am I most excited to see tonight?" Somerhalder, 32, smirked. "Nina Dobrev!"
His girlfriend, who turned heads in a strapless blue and green cocktail dress, was less forthcoming. "I'm excited to see Selena Gomez because she's hosting and I'm really happy for her," Dobrev, 22, said.
Will their relationship stand the test of time? "They are the real deal," a pal of the couple recently told Us Weekly.