Chris Pratt surprises wife with wedding ring

Actor Chris Pratt gave a giant diamond ring to wife Anna Faris.

On a red carpet event of Pratt's film "Passengers", Faris,

revealed that the actor gave her the surprise two days prior to

the premiere of his movie, reported The Huffington Post.

"He just got me this ring. I know. Like, two days ago. I look (at it) and I'm like, 'I can't believe it, either!' He's an incredibly romantic man and I'm very, very lucky," she said.

The stunning oval-cut stone, circled by a halo of diamonds

and offset with a sparkly gold band, appears to be considerably bigger than Faris' original wedding ring.