Julia Roberts and Ellen Degeneres have something in common. Both were cameos in Taylor Swift's 1989 world tour. Both famous Hollywood stars discussed how it's like to be in Taylor Swift girls squad.

Roberts, who is currently promoting her new movie, Mother's Day, was invited to the Ellen Show and both of them shared their stories on being the mystery guests in Taylor Swift concert.

Roberts, who were taking her children to Swift's concert, was asked to join Swift on stage in Santa Clara singing the hit, 'Style'. Recalling the memory on being the 'Taylor's squad', the award-winning actress said she was surprised on the invitation and it was her last-minute decision.

Tonight Joan Baez and Julia Roberts danced it out to 'Style'. These two women are my heroes. What an honor. pic.twitter.com/ERFqo1SS8H

— Taylor Swift (@taylorswift13) August 16, 2015

Her oldest son encouraged her to take it whilst her 8-year-old daughter wisely advising her only to do it when she felt comfortable with. Sporting a 1989 t-shirt, she was seen having fun sharing the stage with the artist albeit admitting she was nervous. Claiming that her whole family is a 'bunch of Swifties', the 48-year-old mother danced along Swift and Joan Baez. The unforgettable experience, according to her, earned her praise from her children. Referring to Entertainment Weekly article, Ellen threw a comment on being in Swift's squad. She told Roberts that she dressed up in sparkly wardrobe similar to the singer's and jokingly added she knew what Swift would be wearing that time.

Ellen Degeneres, the pop princess. A photo posted by Taylor Swift (@taylorswift) on Aug 25, 2015 at 2:13pm PDT

Swift had invited famous persons for onstage appearance; some of the names including comedian Chris Rock, Rolling Stone's Mick Jagger and basketball legend Kobe Bryant.

Roberts is also currently promoting her other movie, the Money Monster, with George Clooney. The Roberts shared her experience to Ellen on starring the blockbuster with the famous actor. Clooney often called her 'a quitter' because she would sneak out to go home from big dinners as she preferred to be with her family.