Jen says motherhood will be her top role

Jennifer Aniston says she and Brad Pitt want at least two children and says motherhood is "probably the most important job I'll ever do".

Aniston tells US presenter Diane Sawyer in an interview to air in America this evening: "Definitely love to have two (children) - at least.

"I've liked working right now, but I also feel that this'll be probably the most important job I'll ever do - having a baby.

"That deserves time like my career deserves time. Friends was fantastic. I bet I'll be able to say it was the time of my life."

The final one-hour episode of the sitcom is expected to be filmed on January 23 in Los Angeles and will air in America on May 6.