French, Saunders do 'Mamma Mia!' routine

Dawn French and Jennifer Saunders are to take a brief break from retirement with a spoof of Mamma Mia! for Comic Relief.

Joanna Lumley, Matt Lucas and Sienna Miller will join the comedy duo in the charity performance, Hello! reports.

The swan song, which is billed as French and Saunders's last ever TV collaboration, will be shown as part of Friday night's Comic Relief programming.

The TV pairing unveiled their last six-part sketch show on the BBC, A Bucket O’ French & Saunders, in November 2007.