You could say he's always had a fascination with the great unknown and now Charlie Sheen appears to be on the hunt for the legendary Loch Ness monster. Well, at least from what we can tell from his Twitter account.

The 47-year-old actor has posted a snap of himself wearing a bronze battle helmet with a message alluding to the mythical Scottish beastie.

''Once again MIT grant sanctioned archeologists Pekk & Sheen, rig battle gear for tonight's sortie on the Loch Ness.'' Sheen tweeted.

One fan responded to his message, writing: ''It's about time Nessie was found!! Thanks Charlie. (sic)''