We got the chance to chat with Hollywood heavyweights Sylvester Stallone and Robert De Niro who were in town promoting new boxing film 'Grudge Match', so naturally we had to ask if Sly had tapped up Bobby for a part in the fourth 'Expendables' film.
"[Sly's] been talking about," admits De Niro.
"Now I know him, I know his phone number, yeah," explains Stallone, "He'd definitely be great in it."
Sylvester Stallone’s ‘Expendables' formula has proved to be a solid model so far. Cram as many action stars as you can into each film, then get some more for the sequels.
[Watch: First teaser for Expendables 3 explodes online]
'Expendables 2' added Jean-Claude Van Damme and Chuck Norris to the already heaving roster that includes Sly, Arnie, Bruce Willis, Jason Statham, Dolph Lundgren, Jet Li and many more.
The third ‘Expendables’ brings Harrison Ford, Mel Gibson, Wesley Snipes and Antonio Banderas into the fold, so who could be next recruit for the inevitable 'Expendables 4'?
A recent rumor suggested Justin Bieber could join the gang (seems very unlikely to us), but we have it from the horse's mouth that Robert De Niro is on Sly's hit list.
Watch our exclusive video above of the stars promoting new film 'Grudge Match’ to find out why Stallone thinks De Niro would be “great” for the fourquel.
'Grudge Match' is in UK cinemas on January 24. See De Niro and Stallone face off in our clip below.