Actress Dianna Agron is reportedly engaged to Mumford & Sons star Winston Marshall.

The former Glee star began dating the Mumford & Sons banjo player in July (15), and sources tell Us Weekly the 27-year-old musician popped the question over the Christmas (15) holidays.

No further details have been revealed at this time, and the stars, who are famously private, are not expected to confirm or deny the news anytime soon.

Dianna, 29, has made no mention of an engagement on social media, but she took to Twitter on Monday (18Jan16), as she started work on new movie Novitiate, a coming-of-age drama about a group of young nuns, set in the 1960s.

"First day of shooting. Let's pray," she wrote, adding a prayer emoji.

The movie also features Melissa Leo and The Leftovers actress Margaret Qualley.

Dianna clearly likes British boys - she previously dated Magic Mike actor Alex Pettyfer, hunk Christian Cooke and director Henry Joost, while she has also been linked to movie star Sebastian Stan and actor Thomas Cocquerel.

Meanwhile, her rumoured new fiance enjoyed a brief relationship with Katy Perry.

If the new romance reports are true, it will mark the second time a member of Mumford & Sons has fallen for a top actress - the band's frontman Marcus Mumford is married to Carey Mulligan.