Star Dakota Johnson made a surprise appearance on “ Saturday Night Live ” this week, playing the mysterious “Madeline” during Lily Allen ‘s performance of that track. The song was Allen’s second of the night.

Lily Allen was joined on Saturday Night Live by Dakota Johnson, who played the infamous “Madeline” in a surprise cameo. Allen, 40, was performing the track from the West End Girl album on Saturday (13 December) when Johnson appeared on stage to offer Madeline's version of events.

Lily Allen and Dakota Johnson deliver powerful onstage collaboration during "Madeline" performance, addressing Allen's painful divorce from David Harbour.

Over the weekend, Lily was the musical guest on Saturday Night Live, where she opened the show with a rendition of Sleepwalking, and closed it with stand-out track Madeline. And it was this second performance that really got people talking thanks to the inclusion of a surprise guest.

Josh O’Connor hosted this week’s episode, which satirized an airborne news conference and also featured a pair of very sensitive male strippers.

Lily Allen is back in the spotlight as she prepares for her appearance on Saturday Night Live on Saturday3. The British singer-songwriter, 40, took to Instagram on Wednesday0, to share a carousel that gave behind-the-scenes looks at her week in NYC.

This week's SNL Pregame includes Ashley Padilla and Lily Allen's late-night visits, the "Haircut" sketch, Hot Ones Wing Pong, and more.