Keira Knightley and James Righton
05/28/2012 at 07:30 PM EDT
was flashing more than her megawatt smile Sunday in London – she also showed off her engagement ring from James Righton.
The British actress, 27, who is newly engaged
to the Klaxons keyboard player, 28, was sporting what appeared to be a circular diamond on a thin gold band as she strolled around town with her fiancé – the two of them kissing much of the way.
The pair were dressed for early summer – England has been hit by a heat wave in recent days – with Knightley in a denim skirt and white T-shirt and Righton in light pants, a white T-shirt and a striped long-sleeve shirt.
Knightley and Righton have been together for about a year, following the actress's split
from Rupert Friend.