Norma Shearer
I assume you mean the 1936 movie. That was Leslie Howard. You know, the dude who played Ashley in Gone With the Wind.
Clare Danes played Juliet in the 1995 film opposite Leonardo di Caprio.
Leonard Whiting plays Romeo in Franco Zeffirelli's 1968 movie of Romeo and Juliet. Leonardo DiCaprio played him in the 1996 Baz Luhrman movie. He has also been played on film by Leslie Howard, Lawrence Harvey, Christopher Neame, Patrick Ryecart, Antoni Cimolino, Jonathan Firth and about 50 more actors and ballet dancers according to the IMdb.
If you mean the new one that takes place in modern times than Claire Danes played Juliet and Leonardo DiCaprio played Romeo.
The first two people to play Romeo and Juliet were Richard Burbage and some teenaged boy whose name we don't know for sure but might have been Robert Goffe. Burbage played Romeo and the boy played Juliet. This took place about 1595. The first woman Juliet was Mary Saunderson in 1662, playing opposite Henry Harris. The first woman to play Romeo was Charlotte Cushman, an American, in 1845, playing opposite her sister Susan. Romeo and Juliet first appeared on film in 1908, in three different films: one with Mario and Maria Casserini made in Italy, one with Saul Panzer and Florence Laurence (the first film star) made in the USA, and one with Geoffrey Tearle and Mary Malone made in Britain. The first talking film of the play was made in 1936 with Norma Shearer and Leslie Howard. IMdb lists thirty-nine films with the characters of Romeo and Juliet before Zeffirelli's 1968 film, so that film was not even close to being close to the "first" Romeo and Juliet in any possible sense.
Leslie Edwards has: Played The Three Messengers in "Job" in 1936. Played Huntsman in "Le lac des cygnes" in 1937. Played Father Bear in "The Three Bears" in 1951. Performed in "The Royal Ballet" in 1960. Played Escalus in "Romeo and Juliet" in 1966. Played Dr. Stahlbaum in "The Nutcracker" in 1968. Played Mr. Brown in "Tales of Beatrix Potter" in 1971. Played Master of Ceremonies in "Swan Lake" in 1982. Played Prince Escalus in "Romeo and Juliet" in 1984. Played The Counsellor in "The Prince of the Pagodas" in 1990.
Claire Danes played the part of Juliet.
Thanks for asking. Cyd Charisse was replaced by Leslie Caron.
In the 1996 version of the play, Romeo was played by Leonardo diCaprio, who is certainly a famous actor. The 1968 version, also a blockbuster in its time, starred the not very famous Leonard Whiting in the role. The version from 1936, again a blockbuster in its time, starred a much more famous Leslie Howard as Romeo.
Michele Howard has: Played Jeanne Gersant in "Madame le consul" in 1996. Played Young Wife in "Restless Souls" in 1998. Played Leslie in "Coping" in 2000. Played Sarah Peterman in "Sheena" in 2000. Played Deborah in "Once in a Lifetime: Just Go for It" in 2007. Performed in "In the First Degree" in 2013.
There were a number of Romeo and Juliet movies. In the 1996 version, which was a modern version, but had the Elizabethan English, Romeo was Leonardo DiCaprio, and Juliet was Claire Danes. In the 1968 version, which was an Elizabethan version, Romeo was Leonard Whiting and Juliet was Olivia Hussey.
Leslie was played by AnnaSophia Robb.