The British actress, 39, was joined at the event by TV s Clara Amfo, 38, as well as Mick Jagger s ex-wife and former model Bianca Jagger, 77, ahead of Sunday s ceremony.
While a star-studded guest list is assured, the winners and losers among this year s nominees remain maddeningly uncertain as the prestigious event draws ever closer.
The sports commentator, 38, and the radio star, 33, both put on very leggy displays in attention-grabbing ensembles as they posed on the National Gallery red carpet.