ET's Lauren Zima spoke with Sullivan about his 'Live By Night' co-star and what he wants from Kate and Toby's relationship during a celebration event for the season finale of 'This Is Us.'
Affleck revealed on Tuesday he had completed a stint in rehab for alcoholism, but the actor's history with addiction goes back much further.
A source tells ET that Ben Affleck was sober at the Academy Awards in February and had a male sober companion with him that night.
The 44-year-old actress' estranged husband announced he recently completed a treatment program for alcohol addiction.
The 44-year-old actress stepped out in Brentwood, CA amid the news of her estranged husband completing treatment.
The actor announced he recently sought treatment in a surprise Facebook post.
In his heartfelt admission, Affleck credited his estranged wife with supporting him and their three kids.
A source tells ET that the Oscar winner feels he 'has nothing to hide' and wants to do everything possible to 'be a better father.'
'There is no shame in getting help when you need it,' the 44-year-old actor wrote on Facebook.
The estranged couple are continuing to focus on their children.
Ben Affleck and Jennifer Garner remain dedicated to co-parenting.
The film's star told ET in January that he would not be helming the superhero movie.
A source tells ET nothing has changed since the split was announced nearly two years ago.
Matt Damon revealed how Affleck stays in character during Thursday's episode of 'The Late Late Show with James Corden.
