London, July 18 - Hollywood couple Brad Pitt and Angelina Jolie, who met and fell in love on the sets of 'Mr and Mrs Smith', are keen to film its sequel as they think it will help put the passion back into their relationship.

'He's hoping they'll fall in love all over again. They're hoping lightning will strike twice and they can re-spark the magnetism that captivated them five years ago,' femalefirst.co.uk quoted a source as saying.

'It's no secret that relationship wise, Brad and Angelina are on the ropes. The stress of raising six kids and juggling two red hot careers is wearing them down,' added the source.

Pitt, who filmed 'Mr and Mrs Smith' while he was still married to former 'Friends' star Jennifer Aniston, has asked its screenwriter Simon Kinberg to write the sequel to the romantic action film.