The 38-year-old actor plays Laird Mayhew in his new film, Why Him?, an eccentric Silicon Valley billionaire who's trying to win over his girlfriend's father. ET spoke with him at the film's Los Angeles premiere on Saturday, when he revealed that similar to his character, he hasn't always been a hit with the ladies' parents.
"No fathers have disliked me like Brian's character dislikes me in this movie [but] there's been a mother or two that just didn't like me," James tells ET's Katie Krause. "I remember being very young and throwing pebbles at somebody's window and the mother coming out and treating me like a bum -- 'Get out of here, you scum!'"
"He's supposed to get married in February," James shares. "I think he's so casual about it."
ET spoke to Dave while he was promoting Now You See Me 2 in June, when he was indeed super relaxed about his upcoming nuptials. "We're pretty lax about the whole thing," he said of him and the former Community actress. "It'll happen when it happens."
Dave also said that neither James nor their brother, Tom, will be the best man.
"I don't know if I'm gonna have a best man," he mused. "I feel like when we do eventually get married, we're not gonna do a lot of the traditions and we're just gonna make it easy and who knows?"