Millie Bobby Brown wanted her papa by her side when she married Jake Bongiovi. "The second Jake proposed, I said, 'I know who needs to marry us. It's my papa,'" Brown, 21, said of Stranger Things costar Matthew Modine, who plays Dr. Martin Brenner, a.k.a. "Papa," on The Tonight Show Starring Jimmy Fallon earlier this year. Brown said that when she initially called Modine, 66, to ask him about officiating the wedding, he said, "OK, sure." However, when they sent him the invitation eight months later, she asked if he was still willing to officiate - and he responded with surprise.