Joaquin Phoenix gave actress Reese Witherspoon a pleasant surprise last night (07SEP05), when he showed up unannounced during her interview with comedian Jay Leno.

The screen stars play late country legends Johnny Cash and JUNE CARTER CASH in the upcoming biopic Walk the Line, and they were reunited briefly when Phoenix interrupted Witherspoon's TV interview to sign a motorbike the comedian is auctioning off for Hurricane Katrina relief efforts.

Witherspoon and fellow guest Hugh Laurie also added their signatures to the bike.