I would call her sister the legend
Vanessa Redgraves remains the only British actress to ever have won the Oscar, Emmy, Tony, Cannes, Golden Globe and the Screen Actors Guild awards. She was also the recipient of the 2010 Bafta Fellowship for "Outstanding Contribution to Film".
A member of the Redgrave family of actors, she is the daughter of Sir Michael Redgrave, sister of the late Lynn Redgrave and Corin Redgrave, and the mother of Hollywood actresses Joely Richardson and the late Natasha Richardson.
source wiki