Could the ubiquitous David and Victoria Beckham, subjects of an upcoming NBC reality special (read: backdoor pilot), turn up in the last ever episode of Extras?

British paper The Sunday Mirror has reported that the overbearing celebrity couple--who recently made the move to sunny Los Angeles so that hubby David Beckham could play for the LA Galaxy team--will play themselves in a cameo role in the Christmas special for Ricky Gervais and Stephen Merchant's HBO/BBC series Extras.

Previously announced special will mark the end of the series for Extras, much in the same way that the Christmas special of The Office served as its series finale. (Sniffle, sniffle.)

The Beckhams would join George Michael, Madonna, and Clive Owen in the special, which will be written by Gervais and Merchant.

"Ricky is over the moon after getting confirmation from David and Victoria," an unnamed source told the Mirror. "He's still discussing how the Beckhams will appear, but they have indicated there is no limit to how silly they are prepared to look."

Really, there's no limit? Hmmm, maybe this unnamed source--said to be a "friend" of Ricky Gervais--hasn't seen Posh and Becks in their new NBC reality project?

The Extras Christmas Special is slated to air in two parts on BBC1 at Christmas and possibly later this year or next on HBO.