It’s a rare thing to find Matthew McConaughey wearing a shirt, let alone a suit, but PEOPLE’s former Sexiest Man Alive indeed suited up – in brown and orange plaid, no less – to plug his latest film, We Are Marshall. And when the film is released on Dec. 22, you might recognize McConaughey’s ’70s-inspired threads. Why? Well, he sported those suits in the film. Like another actor who has been caught wearing his costumes off-screen, McConaughey explains that his clothes brought things into focus for him. “The plaid suit helped me find the character,” he told the press. “I loved it. Still wearing them!” Fair enough, but we think McConaughey might just have a flair for the ’70s. What do you think about McConaughey’s dated threads? And should actors still wear their costumes when filming wraps?