long black a line dress Women's Formal Dresses & Evening Gowns length dress a sleek A-Line Long Sleeve Black Lace

Playing all of Abba's hits is a must, especially "Dancing Queen." Disco ball decorations, '70s attire and portable karaoke microphones party favors will make for the perfect Mamma Mia!-themed celebration

Plus, Rent The Runway has so many stylish looks to choose from

Dark Deep-Sea Siren Get the Look: GL3374 - 3-D Butterfly Sheer Corset Bodice Mesh Mermaid Long Dress Morph into a dark ocean enchantress with a look thats a twisted take on classic mermaid talesthink Ariel if she had become a baddie

Falling gracefully to the knee, its tailored for a clean, flattering silhouette that transitions seamlessly from day to evening

The waistline is the quietest design decision in any gown and one of the most powerful, because it tells the eye where your body divides