Though the 27-year-old star wasn't allowed to reveal much information about Finn's upcoming film, she did say it began shooting in September.
"I can't really talk about his character," she explained. "But it's going to shoot in September. I'm really excited about it. He's really excited about it."
It would be fair to assume that Seyfried will be co-starring alongside the canine as she told Ellen she "can't really go many places without him."
"He's with me right now. He's actually backstage," she responded when Ellen mentioned they might have a "borderline" relationship.
Later on, she explained why:
"He cuddles with me and he listens to me, and he loves me and he looks at me all the time."