Britain's Prince William and his fiancee Kate Middleton smile following a naming ceremony for the new Royal National Lifeboat Instution's (RNLI) Atlantic 85 lifeboat 'Hereford Endeavour' at Treadur Bay lifeboat station on Anglesey, north Wales, February 24, 2011. Prince William and bride-to-be Kate Middleton performed their first official engagement as a couple on Thursday, giving them an early taste of the life in the spotlight that awaits them. [Sina]