The 30 Rock star revealed that her boyfriend Ben Jorgensen proposed on the eve of the Screen Actors Guild Awards while the two were staying at a Four Seasons Hotel.
"I was so shocked," Bowden told Giuliana Rancic on the red carpet at the SAG Awards on Sunday evening (January 29). "And I said, 'Oh my God', and I hugged him."
The actress went on to say that as Jorgensen's proposal was relatively out of the blue, she completely forgot to accept.
"We talked about it, so it wasn't out of nowhere, but I was so surprised," Bowden said. "That's why I forgot to say 'yes' at first."
Bowden has previously claimed that Robert Pattinson is not her type, saying that the Twilight star always looks like he's scowling.
She joined the cast of comedy thriller Nurse 3D in August 2011. The film also stars Boardwalk Empire's Paz de la Huerta and High School Musical actor Corbin Bleu.