Joseph Gordon-Levitt has landed another big name for his feature film directorial debut - Julianne Moore has signed up to star alongside his pal Scarlett Johansson.

I'm incredibly happy to have the brilliant Julianne Moore on board!

The Inception star's untitled new project will feature him as a modern-day Don Juan, who sets out to mend his ways and become a less selfish person.

The Oscar nominated actress will play an unlikely mentor to his character, reports Variety.com.

Confirming the casting news on his Twitter.com blog, Gordon-Levitt writes, "I'm incredibly happy to have the brilliant Julianne Moore on board!"

Filming is due to begin in April (12).