Brad Pitt is reportedly dating another Hollywood A-lister over two years after he split from his Oscar-winner wife Angelina Jolie.

The 55-year-old Allied actor is seeing Charlize Theron, 43, according to The Sun.

They were introduced by her ex-fiance Sean Penn, it was alleged by the publication. 'The new lovebirds were all over each over at a showbiz function last week,' a source claimed.

That function was a showing of the movie Roma at the Chateau Marmont in West Hollywood on January 12.

Theron was at the party and Pitt came later after a screening of his movie If Beale Street Could Talk, where he posed with Blanca Blanco.

'Brad came over to Chateau afterwards, changed his outfit and joined Charlize in a corner of the bar,' said the insider.