Of all the question marks hanging over Tom Cruise personally and professionally, none are as big as this: did he wear a prosthetic butt for one shot in 2008 historical thriller, Valkyrie?

The mere possibility attracted 17,000 retweets, the idea of such a juicy double being too much for Twitter to comprehend.

The appropriately named Twitter user @ILoveButts237 was the first to point it out saying, "Hello, please, I present the theory that for one single shot in Valkyrie (2008), at 5:12, Tom Cruise wears a fake butt. Observe." He then attached the picture linked above for proof.

This week we got answers, thanks to a reporter at ScreenRant who had the guts to ask Cruise about it.

So was it down to padding for a soft landing? An abandoned, posterior-based sub-plot?

No, it was all Cruise.

The actor was unaware of the tweet's vitality but confirmed: "There was no prosthetic in Valkyrie. No."

It's been a big month for Tom Cruise's butt, which also features heavily in American Made due to his character Barry Seal routinely mooning his family when departing for a dangerous mission.

Cruise clarified these shots for us too: "It's me. It's not CGI, it's me. I do my own mooning in films. So let it be known - I do my own mooning."