Liam Neeson pranks his co-star's ex as character from 'Taken'

'I'll break your other arm … slowly.'

Imagine getting a threatening phone call from gravelly-voiced Liam Neeson at work, and having him tell you he'll break your arms.

Neeson's phone tirade in 'Taken' – when he threatens an entire terrorist cell with his special skills – has become something of an internet favourite.

So when Maggie Grace (who plays Liam Neeson's daughter in the franchise) found herself dealing with some heartbreak over a break-up, Liam decided the young man needed a talking-to.

And Maggie recorded it, of course - and shared it on Conan O'Brien's show this week.

As Maggie herself says: "best fake movie dad any girl could ask for."

The pair are on the promotion circuit for 'Taken 3', out this month, so Neeson himself appeared on 'The Tonight Show' with Jimmy Fallon - where Jimmy challenged Neeson to an arm wrestle.

The laugh Neeson lets out at the very notion is classic.