The Discovery Channel’s Shark Week is here and people on Twitter are showing their enthusiasm - especially celebrities.

While on vacation and swimming with sharks, singer Demi Lovato took to tweeting about her excitement for Shark Week.

The Rock also took to Twitter to post a video for Shark Week of him remembering fellow actor Paul Walker who was apparently a huge shark fan.

Actor Rob Lowe is featured in this year’s Shark Week promo, which is about as over the top as the film Sharknado. The promo includes Lowe riding on the back of two sharks with a mermaid while sharks leap in the air behind him.

For Shark Week’s Shark After Dark show, celebrities such as Ashley Tisdale, Tara Reid, and Chelsea Handler will be appearing due to their shark obsessions, according to Deadline.

Larry King and Craig Ferguson are also apparently going to be featured during Shark Week according to King’s tweet.

Shark Week’s official Twitter page has been coming up with many hashtags to promote Shark Week, including #SharkFact, #SharkChat, #SharkSwag, #FinFree, and the obvious- #SharkWeek.

Shark Week runs August 10th through August 16th. TheCelebrityCafe.com also has a list of the Top Ten Shark Movies for viewers who cannot get enough of sharks.

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