Lindsay Lohan had a constant stream of regular visitors while in rehab at Cliffside Malibu, but RadarOnline.com has exclusively learned one unexpected visitor was actor and producer, Ben Affleck. 
 
 As reports circulated — and were denied — that Lindsay has a role in Affleck’s upcoming film Live by Night, it turns out the idea wasn’t as far fetched as it sounds. 
 
 “Ben came to visit Lindsay while she was at Cliffside to talk about the possibility of a role in his movie,” a former patient who attended rehab with Lindsay, 27, told Radar. 
 
 “Lindsay was excited about the opportunity, telling me that she was going to have dark hair in the movie and would have an Irish accent.” 
 
 According to the insider, Affleck arrived with an assistant at the Malibu treatment center late at night just a few days before Lindsay’s birthday on July 2 and stayed for about an hour. 
 
 PHOTOS: Celebs Who Have Been In Rehab 
 
 “A former substance abuser himself, Lindsay said he was there to check on her and see how she was doing,” the source said. 
 
 “She tried to tell me he was being flirty with her, but that’s just Lindsay’s way of embellishing because she constantly needs attention.” 
 
 And while a source close to the movie maintains that Lindsay “isn’t being considered and won’t be in the movie,” they also didn’t deny the actor’s visit to Lilo in rehab. 
 
 PHOTOS: Lindsay Lohan Leaves Rehab 
 
 Would Affleck be making a mistake by casting Lindsay in one of his movies? Sound off below… ||||| After going public with their relationship a year ago, Ben Affleck and Lindsay Shookus split earlier this month after the Saturday Night Live producer could no longer handle his struggles with addiction, a source says. 
 
 “Lindsay had been supporting Ben’s sobriety and going to meetings with him. She had him in meditation and they were doing it together,” a source close to the former couple tells PEOPLE. “His recovery was something that was very important to both of them.” 
 
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 As Affleck, 46, began to spiral in recent months, however, Shookus, 38, felt increasingly helpless, says the source. In the end, she decided it would be in Affleck’s best interest to end the relationship. 
 
 “It was very hard for her to break up with Ben, but she knew he wasn’t getting better and that it was time for her to step aside,” says the source. “She was trying to stay as close to him as possible so that he would stay on the right path, but ultimately it just wasn’t possible. She knew she had to let him hit bottom.” 
 
 RELATED: Ben Affleck and Lindsay Shookus Split Over Distance, Says Source: ‘They Tried to Make It Work’ 
 
 Adds the source: “All she wanted was for him to be happy and healthy. It was a difficult choice but the right one.” 
 
 An Affleck pal previously told PEOPLE the couple called it quits because of distance and timing, adding that the split was “amicable.” 
 
 Affleck — who was seen recently spending time with 22-year-old Playboy model Shauna Sexton — entered rehab on Wednesday. His ex, Jennifer Garner, 46, drove him to a Malibu treatment center. 
 
 An insider told PEOPLE he “knew he needed help and was vocal about it.” 
 
 RELATED: Inside Ben Affleck’s Longtime Battle with Addiction — and What He’s Said About It 
 
 Affleck — who shares daughters Violet, 12, Seraphina, 9, and son Samuel, 6, with Garner — first sought treatment in 2001 when his pal Charlie Sheen drove him to a facility where Affleck completed a 30-day residential rehabilitation program. 
 
 RELATED VIDEO: Ben Affleck Likes to ‘Date Who He Wants and Not Feel Tied Down’: Source 
 
 In March 2017, Affleck revealed in a Facebook post that he had again completed treatment for alcohol addiction. “I want to live life to the fullest and be the best father I can be. I want my kids to know there is no shame in getting help when you need it, and to be a source of strength for anyone out there who needs help but is afraid to take the first step,” wrote the star. 
 
 If you or someone you know is in need of help, please contact the SAMHSA substance abuse helpline at 1-800-662-HELP.
– Ben Affleck knows a little something about rehab, so he decided to show his support to Lindsay Lohan during her most recent stay. While she was at Cliffside Malibu, Affleck met with her secretly to give her some tips on staying sober in Hollywood—and making a successful comeback. Sources tell TMZ that Affleck also told LiLo she's talented and has the support of others in the entertainment industry, and that LiLo was moved by his words. (Some outlets reported Affleck was offering Lindsay a role in his new movie, but TMZ says that's not the case.) Meanwhile, Lohan's much-anticipated sit-down with Oprah Winfrey airs on OWN Sunday at 9pm, and previews have been trickling out. In the latest, E! reports, Lindsay tells Oprah, "I'm my own worst enemy, and I know that." This and previous promos have shown Winfrey interrogating Lohan with questions including, "Do you think you can turn it around?", "What is it that you are addicted to?", "What's going to be different this time?", and "When you get the first DUI, is that a wake-up call?" Winfrey said last week that Lohan's responses seemed "honest" and "authentic."