Rob Lowe
The Parks and Recreation actor starred in the ridiculously amazing 2014 Shark Week promo and tweeted, "If you like me and you like sharks, pretty sure you will like this."
Demi Lovato
"IT'S ALMOST SHARK WEEK!!!!!!!" the "Really Don't Care" singer tweeted.
Ashley Tisdale
"2 words. SHARK WEEK. Tonight. Im so excited. I can't. Omg. Djcisjsncjjens aaaahhhhhh," the blonde tweeted in August 2013.
Evan Rachel Wood
"Shark week!!! (me running around the kitchen) Shark Week!!!" The Wrestler actress tweeted.
Jimmy Fallon
"Swimmin' in the ocean and you see a little motion—here comes the big fin, sharky wants his din-din! #sharkrap," the funnyman posted in honor of Shark Week.
Stephen Colbert
Back in 2010, the Colbert Report host declared Shark Week a holy holiday on his show. "It is so easy to forget that the week after Christmas is one of the two holiest of holidays," he said. "The other being, of course, Shark Week."
Michael Phelps
The Olympic swimmer doesn't make any other plans when it's Shark Week. "Hmmmm #sharkweek my night is set up," he posted on Twitter.
Snooki
The Jersey Shore star loves the Discovery Channel event so much that she tweeted, "#sharkweek all night baby!"
Conan O'Brien
The late-night host shared his excitement by tweeting, "Can't believe it's Shark Week again. It seems like yesterday I was taking down last year's Shark Week decorations."
Kenneth Cole
"@SharkWeek 25th aniv. Why have so many been so fascinated by these creatures for so long (They don't even make good handbags)? #SharkWeek," the fashion designer posted on Twitter in 2012.
Rainn Wilson
The Office comedian jokingly tweeted, "In honor of Shark Week, I'm going to eat Michael Phelps."