Jared Padalecki, Jensen Ackles, Misha Collins and Mark Sheppard will all be back on Supernatural!

As the younger Winchester brother, Jared Padalecki has grown before our eyes on Supernatural.

In 2001 Jared guest starred on ER in Season 7 Episode 10 as Paul Harris.

Jared's first credited roll was in a baseball film starring Hallie Kate Eisenberg n 1999. He played Matt Nelson. Isn't he cute?

For ten years Jensen has played the elder Winchester brother on Supernatural.

Jensen's first credited role was as Michael Duss in an episode of the PBS series Wishbone in 1996 titled "Viva Wishbone!" Wishbone was a dog.

Also in 1996, Jensen visited Sweet Valley High on UPN. He played Brad in Season 3 Episode 17, "All Along the Water Tower."

Misha hasn't even been in half of the episodes, but it's almost impossible to imagine Supernatural without Castiel now.

Misha's first credited role was in 1998 on a UPN historical drama series called Legacy. In Season 1 Episode 8, "The Big Fix," he played Andrew. Adorbs!

In Charmed Season 2 Episode 7, "They're Everywhere," Misha played Eric Bragg. Third acting credit for him and it was in a supernatural show. Score!

This is Mark Sheppard as the Crowley we love on Supernatural.

Mark's first credit was in the CBS portion of Silk Stalkings. He appeared in more than one episode during Season 2 in 1992-93 as Eddie Bryce.

Mark didn't take long to work in the supernatural genre. His third role was in The X-Files Season 1, Episode 11, "Fire," as Bob the Caretaker/Cecil L'Ively. Judging by the photo, he was the main baddie of the installment.