James Maslow hits the carpet with girlfriend actress Halston Sage at NYLON Magazine and Tommy Girl’s Young Hollywood Issue Party held at Hollywood Roosevelt Hotel on Wednesday night (May 9) in Hollywood.

The 21-year-old Big Time Rush actor/singer tweeted out his birthday wishes to Halston, now 19. “@HalstonSage Happy Birthday Baby! :)”

PHOTOS: Check out the latest pics of Halston Sage

“thank you baby…and thanks for all of the surprises :)” Halston tweeted back. Aren’t they adorable?

Fellow Nick star Avan Jogia is also pictured below.

15+ pics inside…