Who will replace Jon Stewart on 'The Daily Show'?

That's the question that Comedy Central must answer now that Stewart is stepping down as host of "The Daily Show" after more than 15 years.

Speculation has already started over potential replacements, and the network has plenty of candidates to chose from.

The stakes are incredibly high for Comedy Central -- "The Daily Show" is one of its most popular and critically acclaimed shows.

To get the ball rolling, here are some possible successors:

Who can replace Jon Stewart on "The Daily Show"?

Olivia Munn

Munn would be an interesting pick for many reasons. For starters, she knows the territory.

The actress was the Senior Asian Correspondent for "The Daily Show" from 2010 to 2011 before leaving to star on HBO's drama "The Newsroom."

Munn would also inject some much needed gender diversity to late night TV -- an area mostly dominated by men.

Chris Hardwick

The news is a lot more social than it was when Stewart took over back in 1999.

That's one reason Chris Hardwick could be a great choice to lead "The Daily Show" into the future.

Hardwick has a youthful fan base and his Internet oriented show "@midnight" already anchors the tail end of Comedy Central's nightly schedule, airing after Larry Wilmore's "The Nightly Show."

Having Hardwick replace Stewart may add some social media criticism to "The Daily Show."

Amy Poehler

It would not be a giant leap for Poehler (or her friend Tina Fey) to go from one satirical news desk to another.

The popular actress can deliver hilarious and thought provoking social commentary, talents that shown through during her stint as a "Weekend Update" anchor on "Saturday Night Live."

With her NBC series "Parks and Recreation" wrapping up this winter, her schedule looks to be fairly open.

Jason Jones, Jessica Williams or any of the current "Daily Show" correspondents

Comedy Central could also promote from within.

Stewart had a great eye for talent over the years, and promoting Jason Jones, Samantha Bee or Jessica Williams could be a seamless transition for the show and the network.

The network already had success with this strategy, selecting John Oliver to fill in for Stewart in 2013 when the anchor took a sabbatical to direct "Rosewater," his first major film.

Oliver now hosts HBO's very popular "Last Week Tonight." (HBO is owned by Time Warner, the parent company of this website.)

Related: Jon Stewart to sign off 'Daily Show'

While Stewart's departure does open up some interesting replacements, Comedy Central has time to find a successor.