Charlie Hunnam
IN PHOTO: Cast member Charlie Hunnam waves to fans at the premiere of "Pacific Rim" at Dolby theatre in Hollywood, California July 9, 2013. The movie opens in the U.S. on July 12. Reuters/Mario Anzuoni

Gorgeous men wearing different shades of grey flooded the Calvin Klein runway as the show features the brand's Men's RTW Fall 2015 collection with Calvin Klein Reveal model Charlie Hunnam in the show's front seat. The "Sons of Anarchy" star suited up for the Milan Menswear Fashion Week Fall Winter 2015/2016 on Sunday, Jan. 18, in Milan wearing a Calvin Klein look by creative director Italo Zucchelli.

"I came with my little brother, we came here last night, we had a nice meal, we do the show today and go home tomorrow," said the "Crimson Peak" star who first appeared for Emporio Armani 10 years before landing a gig with Calvin Klein in an interview with Women's Wear Daily. "That was a nice way to come to Milan for the first time, as Mr. Armani's guest, and now the second with time with Calvin Klein, it's a pretty nice way to come back here."

Sam Taylor-Wood's "Fifty Shades of Grey" is not even in theatres but grey is the celebrated colour on Sunday night with over 50 shades of grey of menswear. Featuring a pep up collection of new designs with embossed leopard and cheetah patterns, the Calvin Klein Men's RTW Fall 2015 show unveiled their wide assortment of grey overcoats, parkas, blazers, stadium coats and lean trousers.

Inspired by black and white movies, Calvin Klein's autumn/winter 2015 collection includes the shade of dove, granite, slate and charcoal with black and white touches. Emphasizing on digital growth, the 2015 designs goes back to the brand's roots in minimalism emphasizing Zucchelli's loose - oversized drop-shouldered overcoats - and skintight cuts.

Meanwhile, Charlie Hunnam is set to play a drug lord based on the story of Edgar Valdez, also known as La Barbie, who made $130 million in one year for moving drugs from Colombia. Based on the 2011 Rolling Stone article "American Drug Lord," the upcoming movie will be written by "American Sniper" scribe Jason Hall.

The 34-year-old Calvin Klein ad model is also set to star in Guy Ritchie's King Arthur movie after wrapping up his role as Jax Teller in FX biker drama series. The show ended in December after running for seven years.