Best known for playing Sheriff Graham in the ABC series Once Upon a Time, Jamie Dornan is considered something of a heartthrob.And pictured shirtless on Sunday, Jamie lived up to his title as he tested the waters and went for a dip in Miami Beach, Florida.The 30-year-old actor put his toned torso on display as he enjoyed a day in the sun with his stunning fiancée Amelia Warner.Jamie sported a pair of red shorts, flip flops and black shades as he walked along the warm sand as Amelia showed off her aquatic skills.Joining his soon-to-be wife in the water, the Irishman was seen canoodling in the water with Amelia as she wrapped her arms around Jamie's neck.English actress, singer, and songwriter Amelia flashed her sparkler of an engagement ring while wearing a white triangle bikini.Jamie and Amelia announced their engagement last November, and although the pair are yet to set a date for the wedding, it has been reported that their ceremony will take place inside a country house in Somerset.Jamie previously dated Keira Knightley for two years before they called time on their romance 2005.And Warner was once in a relationship with notorious ladies man Colin Farrell, whom she married on a beach in Tahiti when she was 19 but the union was later revealed to not be legally binding.Dornan's latest project The Fall is set to air on BBC Two in the coming months, and stars The X-Files actress Gillian Anderson.The eagerly anticipated series, which was created by Allan Cubitt, tells the tale of local detectives on the hunt for a serial killer.In the British crime-drama Jamie takes on the role of Paul Spector, who is the murderer terrorising members of the public in the city of Belfast.Gallery here for upcoming new videos