The 25-year-old actress - who is married to tennis pro Andy Roddick - is planning on expanding her family eventually and has been inspired by her aunt, a Special Olympics athlete.
She told Canada`s Flare magazine: "I want to adopt a baby with an intellectual disability one day. I mean, that`s in the distant future, but that`s always been a goal of mine.
"Unfortunately a lot of kids with intellectual disabilities are given up for adoption when they`re born because it`s a lot for their family."
However, Brooklyn - who is best known for her roles in movies `Battleship` and `What to Expect When You`re Expecting - is not always so confident with her decisions; she has previously confessed to feeling similar to Kristen Wiig`s insecure maid of honour character Annie Walker in `Bridesmaids`.
She said: "I feel like her character is my inner soul.
"The ways she acts are my inner thoughts, but I just can`t express them because they`re too nerdy. So if he [Andy Roddick] was calling her crazy, I guess that makes me slightly crazy."