Rachel McAdams pregnant?! Not so fast…

Has Rachel McAdams made a vow to keep her pregnancy under wraps?

The 33-year-old Canadian actress, who has been dating British actor Michael Sheen since 2010, was photographed in London on Sunday sporting a sizable baby bump as she crossed Abbey Road.

See also: Rachel McAdams: Film sets 'too distracting' for romance

But don't worry; you're not out of the loop. As it happens, the "Vow" star was sporting a prosthetic bulge to film a scene from her new movie, "About Time." Richard Curtis ("Love Actually") is directing the film about a man who can travel through time. (Wait, didn't McAdams make that movie already?)

See also: Rachel McAdams and Lindsay Lohan: How they've changed since 'Mean Girls'

Though McAdams isn't really in the family way just yet, in 2009 the Ontario native told People she was "looking forward to it someday."

When it does happen, don't expect her to be bringing them up in the U.K. Toronto is where McAdams's heart is.

"I feel very much at home there," she told the U.K.'s Metro last month.