Laura Vandervoort and Oliver Trevenna
02/28/2014 AT 02:15 PM EST
Laura Vandervoort wore an eye-catching hot-pink and black outfit to the Vanity Fair
Young Hollywood party in L.A. on Tuesday, but it was her accessory that got people's attention – she was wearing a huge diamond ring on her left hand.
The Canadian actress is engaged to British actor and host Oliver Trevena, her rep confirms to PEOPLE.
Vandervoort, 29, who's best known for playing Supergirl on Smallville
, has been dating the Young Hollywood
host since the middle of last year.
She's currently starring in the werewolf series Bitten
on Syfy and is featured on the cover of the March issue of Maxim
Vandervoort previously dated fellow Canadian Corey Sevier, who appeared in Smallville
, while Trevena was linked to Carrie Underwood
back in 2007.
ET Canada first reported the news
of their engagement.