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The actor and his wife Renee Puente picked perfectly on trend costumes for the event, with Morrison going as the Joker and Puente channeling her inner Harley Quinn from this summer's blockbuster hit Suicide Squad.

As for why the couple continues their Halloween tradition every year, Renee dished that it's all about "friends and loved ones getting together and having a wonderful night." Morrison added, "That's the big thing. With us living in New York now, this is our only time of the year to get everyone together and just be kids."

And as it turns out, Morrison has extra reason to celebrate come fall time because his birthday just so happens to be Oct. 30!