Dinklage, who has a form of dwarfism, came to prominence in the 2003 independent film The Station Agent.

BBC: Peter Dinklage signs up for X-Men film

In his 2003 film The Station Agent, he played a man who moved to rural New Jersey to live a life of solitude after the death of his only friend.

BBC: The dwarf actor dilemma

"Ninety-five percent of the time, they don't do it, " said Althea Outten, an MTA agent working at the Bowling Green subway station this week, referring to parents and youths taller than 44 inches who don't swipe.

WSJ: Little Ones, the Subway and the Law