Hollywood stars don't shy away from being\u00a0420-friendly. Here are the biggest names in entertainment who like to roll up a blunt or hit a bong -- no matter what the date is.\r\n\r\nFrom Snoop Dogg to Dawn Wells -- if you're commemorating the marijuana enthusiast's national holiday for 420, you have friends in high places.\r\n\r\nRobert Mitchum: The O.G. of celebrity stoners was arrested on marijuana charges in 1948 and\u00a0spent two months\u00a0behind bars.\r\n\r\nWillie Nelson\r\nThe Red-Headed Stranger is notoriously no stranger to the green and announced that he was\u00a0launching his own strain\u00a0of premium weed last year. We have no idea what took him that long.\r\n\r\nDawn Wells\r\nMary Ann from "Gilligan's Island"\u00a0got popped for pot\u00a0in 2008.\r\n\r\nCameron Diaz\r\n\r\n\r\nThe "There's Something About Mary" star has admitted that she used to buy weed from Snoop Dogg. Which leads us to ...\r\n\r\nSnoop Dogg\r\nWe'd have to be completely high to leave him off of this list.\r\n\r\nJustin Timberlake\r\nThe "20/20 Experience" singer\u00a0says he smokes out\u00a0because "sometimes I have a brain that needs to be turned off."\r\n\r\nRoseanne Barr\r\n\r\nThe "Roseanne" star, who smokes to alleviate her glaucoma, got into the weed biz in 2016 by investing in the dispensary Roseanne's Joint. She even famously got stoned an old episode of her show.\r\n\r\nChace Crawford\r\n\r\nThe former "Gossip Girl" star gave people plenty to wag their tongues about when he was arrested for marijuana possession in 2010.\r\n\r\nFrances McDormand\r\n\r\nWhen she's not appearing in awesome projects like "Fargo" and "Three Billboards Outside Ebbing, Missouri," McDormand serves as a High Times cover girl.\r\n\r\nSeth Rogen\r\n\r\n\r\nThe "Pineapple Express" actor not only knows his way around a bong, he's named names when it comes to his famous smoke-out pals.