No — Brenda Fricker is not confirmed to be left-handed, as no reliable public source currently states her handedness.

Brenda Fricker is an Irish actress who has had a long and distinguished career in film, television, and theatre. She is best known for her role as Christy Brown's mother in the 1989 film "My Left Foot," for which she won an Academy Award for Best Supporting Actress.

Her career spans decades, with notable appearances in films such as "The Field," "Home Alone 2: Lost in New York," and "A Time to Kill." Fricker has received numerous accolades for her powerful performances, often portraying strong, maternal figures with depth and authenticity.

Throughout her career, Fricker has been praised for her versatility and ability to embody a wide range of characters. Her work often showcases a remarkable emotional range, making her a respected figure in both Irish and international cinema.