star Justin Long has reportedly embarked on a relationship with Rooney Mara's actress sister, Kate Mara.The two set tongues wagging over the weekend when they were seen celebrating Long's birthday in New York - the same day as ex Drew Barrymore got married - with a source telling that Mara "took him out for his birthday." The source also revealed that the relationship between the two Hollywood stars is "very new".However, further rumours of the couple's alleged relationship comes after they were first spotted attending a performance of on Broadway late last month. And came backstage after to meet the cast." News of Long's romance with Kate Mara comes just days after his former girlfriend Drew Barrymore tied the knot with her art dealer beau Will Kopelman in a star-studded ceremony in California.Long dated Barrymore - who is expecting her first child this summer - from 2007 to 2008, before the couple reuniting again in 2009 for a year, even co-starring in romantic comedies He's Just Not That Into You and Going The Distance.that while the pair have known each other for ‘a while’, things have apparently heated up between them of late.“They recently started hanging out more, going on date-like activities,” said the source, adding, “They’re both busy…but they’re seeing where it goes.” co-star Dominic Cooper for over three years, before splitting up in 2010.
And with every sacred cow, there's gonna be someone making fun of it.
Justin's exes include Drew Barrymore and Ginnifer Goodwin.