Leonardo DiCaprio and Tom Hardy starred in the movie Revenant Leo was so impressed with Tom's performance that he bet Tom he'd get an Oscar nom. Tom didn't think he'd get nominated so he took Leo up on a bet. If Tom got nominated then he would get a tattoo and Leo would pick it! Tom finally paid up on the bet and he got "LEO KNOWS ALL" tattooed on his arm. I gotta give it to Tom for holding up his end of the bet!