The actress – who plays Haley Dunphy in the sitcom – was promoting her new movie See You In Valhalla in Los Angeles on Tuesday night (21 April).
Sarah was joined at the event by British actor boyfriend Dominic Sherwood, and the pair looked mega loved up while posing for pictures together. Aww! The couple met while filming Vampire Academy together, and romance blossomed at the end of last year.
During a recent chat with E! News, Sarah couldn't help gushing about how happy she is, saying: "He's amazing. He's an amazing person!"
Dominic's actually just landed a TV role himself, winning a spot in the cast for a television adaptation of Shadowhunters, based on The Mortal Instruments books.