[6] Among the ballets she danced in Boston were Swan Lake,[7] The Sleeping Beauty,[8] The Nutcracker[9] and Le Corsaire,[10] Balanchine's Serenade,[11] Jewels,[12] Episodes,[13] and Coppélia,[14] Robbins' The Concert[15] and Fancy Free,[2] Ashton's Cinderella,[16] Cranko's Onegin,[17] Landar's Études,[18] Wheeldon's Polyphonia[2] and McGregor's Chroma.

[19] Outside of the Boston Ballet, in 2014, Ellis started her dancewear brand RubiaWear, which focuses on warm-up attires and accessories.

[20] She conceived the idea after her colleagues noticed her handmade leg warmers and asked her to make some for them.

[21] In 2020, when performances were canceled due to the COVID-19 pandemic, Ellis was among the 32 ballerinas that participated in Misty Copeland's "Swans for Relief" fundraiser.

All of the ballerinas filmed themselves dancing Fokine's The Dying Swan to raise funds for the participating dancers' companies and the arts.

The couple contacted the conservatory, and Birkadze pitched the idea of a program that prepares older students for professional careers.