Polina Semionova is a very pretty (and famous) ballerina. Mikhail Baryshnikov is a famous and extremely well-know male ballet dancer. Apollo is one of Baryshnikov's most famous ballets. George Balanchine was also an EXTREMELY famous (and considered legendary) male ballet dancer.
Olivia Bell is a ballerina with The Australain Ballet! :)
Edgar Degas. To be honest, there is quite a lot of them, but he is probably the most famous.
The most famous pairing was with Dame Margot Fonteyn.
Technically, yes, a ballerina is a celebrity as he or she is famous in the dance world, take Darcy Busell for example, She's famous!