Topher Grace and Ashley Hinshaw, his girlfriend of about a year, are reportedly engaged.
The actress, 26, was sporting an engagement ring Saturday at the Art of Elysium's Heaven Gala, where Grace was also photographed on the red carpet.
The "Interstellar" and "In Good Company" actor, 36, popped the question last week, a source told People.
Grace and Hinshaw went public as a couple around this time last year, when they hit Golden Globe Awards parties together and then spent some time in Santa Barbara, Just Jared reported at the time.
She was most recently seen in the pilot episode of the Marvel-inspired series "Agent Carter," which premiered last week, and appeared in several "True Blood" episodes last year.
His rep did not immediately respond to a request for comment.