Keira Knightley's engagement ring

Keira Knightley packed on the PDA while walking hand-in-hand her new fiance, James Righton. During their stroll, the actress and her beau stole kisses from each other. The pair was dressed rather casually -- they wore matching white T-shirts -- but Knightley had her diamond engagement ring on full display. The Oscar-nominated actress' representative confirmed recently that the lovers were set to tie the knot. The rep noted that Knightley, 27, and Righton, 28, had no comment on their wedding plans or details of the proposal. It will be the first marriage for both Righton and the "A Dangerous Method" star, who confirmed the end of her five-year relationship with actor Rupert Friend in December 2010.