Jennifer Aniston will finally reveal the details on her wedding to Justin Theroux.

The pair became engaged last month and it is rumoured that they are diving headfirst into wedding planning.

There has been much speculation about what Jennifer and Justin are going to do on their big day, but nothing has been confirmed.

Jennifer will tell her good pal Chelsea Handler about the couple's nuptial ceremony on TV programme Chelsea Lately.

"Jen's appearance is penciled in to be the first Thursday night of the relaunched show, when Chelsea begins taping her show from NBC Universal's back lot," a source told the American edition of OK! magazine.

Jennifer's questions have been scripted.

Although the actress is fond of Chelsea's approach, she does not want to be caught off guard.

"Jen loves Chelsea's usual raunchy interview style, but only when she uses it on other people!" the insider revealed.

"She thinks Chelsea takes things way too far, especially when she gets into people's sex lives, so Jen and Chelsea sat down to carve out questions that Jen felt comfortable answering. It was a big negotiation. They planned how the interview will go, and Chelsea has agreed to not get too intimate."