Brook Lynn Quartermaine nee Ashton of General Hospital is the daughter of Lois Cerullo and Ned Quartermaine.

However, her parents separated before she was born and later, she had to develop rapport with her parents’ various romantic partners.
Introduced to the soap in 1997, Brook Lynn was originally stated to be born in 1996. However, her birth year was later readjusted to 1986 to meet the storyline’s demands.
For the newly indicted fans of General Hospital, Brook Lynn has been part of the soap since 1997, played by various actors.

The character has grown up from a baby to a married adult on the show. Currently, Amanda Setton portrays the character.

In the initial years, child actors Kaitlyn Avery, Sarah Avery, and Brooke Radding played Brooke Lynn.

Adrianne Leon intermittently portrayed the grown-up Brooke between 2004 and 2011. In 2019, Amanda Setton took over the role, while Braina Lane briefly relieved her in 2020 and again in 2022.
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Source: CNN