Made of honour (2008)

A guy in love with an engaged woman tries to win her over after she asks him to be her maid of honor. - IMDb editor

Made of Honor revolves around Tom and Hannah, who have been platonic friends for 10 years. He's a serial dater, while she wants marriage but hasn't found Mr. Right. Just as Tom is starting to think that he is relationship material after all, Hannah gets engaged. When she asks Tom to be her "maid" of honor, he reluctantly agrees just so he can attempt to stop the wedding and woo her. - Orange

Tom is a Casanova, who met Hannah in a party. They remained friends for 10 years and maintained their relationship strictly to friendship. However Tom's feelings for Hannah begins to change when he realises that she is getting married. He realises that he loves her. - Keith Francis

Slick stud Tom, a born womanizer, always had a boon for confident Hannah, the one who never fell for his cheeky charms but became his female confident, yen years after their college dorm days. He always waved his New York basketball mates' warning she wouldn't remain available endlessly for a serial dater. For her job as art prospector, she was on a six weeks mission to Scotland, during which Tom realizes he misses her around badly. To his horror, she returns with a Scottish perfect fiance, Colin, who already convinced her to move into his ancestral estate. While hesitating to make a last-chance move, baffled Tom accepts her invitation to act, lacking a girl buddy, as his 'best maid', inspired by his committed mates to attempt sabotaging Colin and convincing her he's the only soulmate. So he comes along to Scotland, where he's heir to the country's largest whiskey distillery, and a champion at everything, from hunting to Highland games, yet Yankee novice Tom must compete. - KGF Vissers