The two actors are constantly compared as both of them are from Britain and have similar qualities. But this does not go down well with either of them, reported Us magazine.
"The truth is, Andrew can't stand Rob. Andrew hates that they're put in the same category because they're both English and around the same age," a source said.
According to witnesses, the two actors clearly ignored each other at producer Kevin Turen's wedding last month.
"They don't enjoy hanging out. Andrew considers himself a 'serious actor' and sees Rob as the equivalent of a cheesy boy bander because of 'Twilight'," the source added.
