The much-loved romantic comedy, which follows the lives of several characters in the run-up to Christmas Day, was released in 2003 and is still watched by many fans during the festive season.
However, Hugh, who played a fictional U.K. Prime Minister named David, is amazed that people still love the Richard Curtis-directed movie.
"I don't know why 'Love Actually' is still so popular," the actor revealed in a recent interview, according to People.com. "Everyone watches it at Christmas, which is nice."
In one memorable scene from the film, Hugh dances around the Prime Minister's quarters at No. 10 Downing Street to The Pointer Sisters' 1984 track, "Jump (For My Love)".
But the father-of-five was mortified at the prospect of filming the scene.
"Do I remember anything from filming? I mean, there was the horror of that scene where I had to dance around. I suspect that was the most excruciating scene ever committed. It wasn't easy for an Englishman in his 40s to do at seven in the morning, stone-cold sober," the 58-year-old explained.
And Hugh had a few kind words about his former leading ladies, including his "Sense and Sensibility" and "Love Actually" co-star Emma Thompson.
"She is not remotely sane. She's nuttier and nuttier as the years go," he laughed.
While Renee Zellweger, who was seduced by Hugh's character Daniel Cleaver in 2001 flick "Bridget Jones's Diary", was dubbed "nutty".
"Renee loves me and I love Renee. Well, I mean she's in the same category as Emma Thompson, in terms of lunacy, but an amazing actress of course, and very generous," the star gushed.