Friends and family of Owen Wilson have been rallying around the actor after he attempted to commit suicide on August 26 by slicing his wrist and ingesting pills. They have also been trying to determine where it all went wrong. "Owen started hanging out around the wrong people again," says a source. To wit: At least two sources blame British actor Steve Coogan. The party boy rehab veteran was Owen's costar in Night at the Museum and Around the World in 80 Days. "I went through it with Steve," rocker Courtney Love, who dated Coogan, 41, until an acrimonious split in 2006, tells Us. "I was just out of rehab, and he was right there with the drugs," she says. "I tried to warn Owen. I tried to warn his friends ... I hope from the bottom of my heart that Owen stays the hell away from that guy." Indeed, former girlfriend Kate Hudson, 28, "forbid him from letting Coogan into his house. She knew he was bad," says another source. Coogan told Extra that these claims are untrue. “These accusations are unfounded, unhelpful and hurtful to all concerned," Coogan responded. "We are taking legal advice.” "The drugs and partying were a huge factor in the breakup," says a pal of Hudson, who has a 3-year-old son, Ryder, with ex-husband Chris Robinson. “As much as she liked him, she didn’t want to be around that" - especially given the fact that Robinson is a recovering drug addict. Wilson's loved ones worried so much about his dependence on hard drugs, Us has learned, that friend Woody Harrelson staged an informal intervention at his Hawaii home in May. But Owen, 38, continued to withdraw and succumb to depression following his June split from Hudson, who is now dating Punk'd star Dax Shepard - which might have pushed Wilson over the edge. "Seeing her happy with someone else made him happy that she'd found that," says one longtime Wilson family friend, "but made him hate himself so much more that he could never do it.”" For more details on Owen's downward spiral into depression, his recovery, and where he’ll go from here.