"Arrow" star Stephen Amell will fulfill a childhood dream this Sunday by stepping into the ring for a tag team match at "WWE SummerSlam" -- and he's commemorating the occasion by raising some money for a good cause.

Amell, who has supported charitable organizations including Fuck Cancer in the past, unveiled a new t-shirt on Tuesday, with a portion of the proceeds to benefit Toronto-based children's hospice Emily's House. The shirt, produced in conjunction with WWE, celebrates Amell's rivalry with WWE Superstar ("Superstar" is WWE's official terminology for its pro wrestlers) Stardust and is based on an image designed by artist Danny Haas.

The shirt is available via Represent.com, but only through Monday night. "Growing up, I loved my WWE shirts," Amell wrote on the page. "The classic graphics with the date and arena... So if I'm going to risk life & limb in a WWE Ring this Sunday, we're definitely doing something to raise money for charity."

This Sunday's match sees Amell team with high-flying WWE Superstar Neville against Stardust and Wade Barrett, freshly crowned the "Cosmic King" by his partner. The "SummerSlam" event received extra mainstream attention this week with the addition of Jon Stewart as guest host, his first TV gig since his final episode of "The Daily Show" earlier this month.

"WWE SummerSlam" takes place Sunday, Aug. 23 at the Barclays Center, and airs live on the WWE Network.