Is there anything cuter than a hunk who loves puppies?

While filming in Sofia, Bulgaria, Kellen Lutz and the cast of "Hercules: The Legend Begins" spent their only day off completing their 13th — and sweetest — labor by volunteering at Animal Rescue Sofia, a no-kill animal shelter that is at risk of losing their funding.

A proud owner of two rescue dogs, Kola and Kevin, Lutz has been honored in the past for his support of PETA and won the Do Something for the Animals award at the 2010 VH1 Do Something Awards. After seeing so many dogs in need, the cast of "Hercules" knew they wanted to help out and even rescued a small pup off of the streets, which they named Hercules, natch.

[Related: 'Hercules' Hunk-Off: Kellan Lutz vs. Dwayne Johnson as Dueling Demigods]

"We found him wandering on the street in traffic," director Renny Harlin told omg!. "We took him home and then brought him here to Animal Rescue Sofia where he is now being brought back to life, back to health, and will find a happy home and never be abandoned again."

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The cast of the movie volunteered their time and donated money to Animal Rescue Sofia, which hopes to raise close to $300,000 by the new year to buy a new facility after losing the lease for their current location.

"It touched my heart – I love animals," Lutz told us. "The great thing about this facility is that they don't turn any dogs away. The hard part is they are running out of funding."

So grab some tissues,and get ready to stare into some seriously adorable and swoon-worthy eyes (dog and actor alike) in the trailer below, and learn more about donations at www.arsofia.com/shelter.

--Additional reporting by Giana Mucci.