A new Gleek announced his presence on Twitter last night.

Ricky Martin, who will guest star on the series next month as a Spanish teacher, sent the following photo to followers, along with the simple message "First day!"

Standing alongside various cast members, Martin actually has a long history with one of them. He and Lea Michele co-starred in Les Miserables when the latter was only eight years old.

Glee returns with a new episode on January 17. It will be titled "Yes/No," include an ode to Grease and be centered around a proposal.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.