car Dancing with the Stars sunglasses David Arquette suit tie

Just hours after the official Dancing with the Stars cast was announced, David Arquette strapped on his dancing shoes -- and finest white suit and Burberry tie -- to practice for the show's 13th season!

Our photogs caught the Scream star leaving the Los Angeles studio Tuesday with two neon bags, which we can only hope are full of shiny, sparkly costume ideas.

Even though he has a professional dancer paired with him, David's hoping he can have a little extra help from a famous longtime pal ... Howard Stern! He told Sirius-XM's Howard 100 News:

    "I want him to be my backstage coach to just help me out if he has any pointers, if he thinks I should focus on something, or what I'm doing wrong and sort of be part of the whole competition."

Who knew Howard would be able to help with jazz hands!

See fellow star Ricki Lake and dancers Maksim Chmerkovskiy, Cheryl Burke and Derek Hough going into the same rehearsal below.