WATCH: Benedict Cumberbatch Decides Whether His Co-Stars are "Naughty" or "Nice"

Because Benedict Cumberbatch has been so prolific in recent years, starring in TV favorites including Sherlock and Patrick Melrose and film hits such as Doctor Strange, he's amassed a lot of co-stars. Like, a small army's worth of co-stars.

So it's plenty of fun watching the Emmy-winning actor decide to whether to put some of them on the "naughty" or "nice" list in a new Radio Times video interview.

He doesn't just assess the relative virtue of Sherlock regulars including Amanda Abbington and Andrew Scott, but also has his say on fellow members of the Marvel Cinematic Universe (MCU) including Chiwetel Ejiofor, Tilda Swinton, and Robert Downey Jr.

Of former Doctor Who assistant Karen Gillan, with whom he appeared in this year's Avengers: Infinity War, Cumberbatch says: "She's so badass, I'd have to put her in the naughty category otherwise she'd be cross with me."

Oh, and he says this to say about Martin Freeman, the Doctor Watson to his Sherlock Holmes: "I think [he] couldn't abide being on a nice list. He'd have to be on the naughty list."

Check out the full video below.

Cumberbatch's latest film, computer-animated Christmas movie The Grinch, opens in theaters tomorrow (Fri November 9). He provides the voice of the curmudgeonly title character, heading up a stellar voice cast that includes Angela Lansbury and Rashida Jones

Which of Benedict Cumberbatch's co-stars do you think is really the most naughty?