They're alleged to be rooming together after striking up a friendship.

And Richard Madden, 32, was running errands with his housemate Brandon Flynn, 25, in Los Angeles on Saturday, putting on an amicable display with the 13 Reasons Why star as they strolled along in the sunshine.

Their grocery list was a little unconventional since Brandon - who is Sam Smith's ex - was carrying a packet of marijuana cigarettes under one arm.

Pals: Richard Madden, 32, was running errands with his housemate Brandon Flynn, 25, in Los Angeles on Saturday, putting on an amicable display with the 13 Reasons Why star

The actor was carrying around a packet of Lowell Smokes, which contain 22-25 percent THC, the chemical compound found in marijuana.

The cigarettes are completely legal in the state of California.

Richard was casually clad for his outing, rocking a zip-up jacket with a shearling collar and a pair of shades.

Brandon, who was dressed down in a white T-shirt and jeans, was seen placing a friendly hand on the Bodyguard star's back as the pair chatted.

Perfectly legal: Brandon was carrying around a packet of Lowell Smokes, which contain 22-25 percent THC, the chemical compound found in marijuana

Richard was previously alleged to have moved in with Brandon after relocating to LA in a bid to carve out a career in Hollywood.

His new housemate was said to have 'introduced lots of his friends' to the Game Of Thrones actor.

A source told The Sun: ‘Richard’s career is going from strength to strength – the world really is his oyster.

New direction: Richard was previously alleged to have moved in with Brandon after relocating to LA in a bid to carve out a career in Hollywood

‘He never really used to like Los Angeles, but went there a couple of times at the end of last year and fell in love with the place.’

Brandon is thought to be single since splitting from award-winning singer Sam last summer.

Sam - who deleted a number of snaps of the pair from his social media accounts - is said to be 'devastated' about the split, as Brandon was 'the most significant' romance the Too Good At Goodbyes singer has had.

'I'm still trying to figure out what I took from that relationship and what it meant to me. It's still quite raw', he recently told The Times.