Brian Austin Green steps out in monochromatic streetwear while out and about solo in Los Angeles

Brian Austin Green kept it simple in monochromatic black and grey streetwear Monday while out and about in Los Angeles.

The 46-year-old actor donned a black hoodie jacket over a black T-shirt along with dark grey sweatpants.

The Beverly Hills, 90210 star completed his outfit with black Vans sneakers.

Brian accessorized with a black cap and sported a thin layer of facial stubble.

The Los Angeles native is best known for his portrayal of David Silver in the Beverly Hills, 90210 franchise since its premiere in October 1990.

Brian last month voiced his staunch support for his co-star Shannen Doherty, 48, after she announced her cancer had returned a year prior and that was in stage four.

He told Us Weekly: ‘I don’t want to speak about her too much, but it’s a hard situation. I mean, you know, cancer is not f***ing easy for anyone 

And I love Shannen, and we’ve always had a great relationship, and she’s strong. She’ll get through this and get out of this what she’s supposed to get out of this.’

He added: ‘Adversity only makes us stronger, if we let it, and it does with her, for sure.

‘She’s a really f***ing good person. She’s a really good person, and so she deserves all the well-wishers and all the friendships that she has.’

Brian has been married since 2010 to actress Megan Fox, 33, and they have three sons together, Bodhi, six, Noah, seven, and three-year-old Journey.

He also has a 17-year-old son Kassius with former fiancee Vanessa Marcil, 51, who played Gina Kincaid on Beverly Hills, 90210.

Brian reprised his role of David Silver last year for the BH90210 reboot that featured original series stars and it was canceled last November after one season.