Matt Ryan, who starred in NBC's cancelled "Constantine" show, will reprise his role as the Hellblazer on The CW's "Arrow" as a guest star, according to The Hollywood Reporter. Ryan will appear in the fifth episode of the upcoming fourth season.

"We are thrilled to have Matt Ryan reprise the role of John Constantine on an upcoming episode of Arrow," executive producer Marc Guggenheim said in a statement. "Matt is an incredibly talented actor and his portrayal of this beloved character was always something we admired. The introduction of magic and mysticism on the show this season has provided a truly organic opportunity for us to bring John Constantine to 'Arrow' and the CW's DC universe. It will be a well-deserved tip of the hat to all the Constantine fans who were so incredibly supportive of that series."

Premiering in October with 4.28 million viewers, "Constantine" boasted a vocal fanbase and decent reviews, but wasn't able to find an audience on Friday nights (the fabled "death slot"). The series, based on the DC Comics/Vertigo antihero John Constantine, wasn't among the network's initial early renewals and there has been talk that it would move to NBC's sister network Syfy. However, such efforts fell through and the show was ultimately cancelled.

"Arrow" star Stephen Amell was vocal about his desire to work with Ryan during the #SaveConstantine campaign, and executive producer Wendy Mericle fueled the fire when she revealed that the "Arrow" team had been talking about a potential crossover with DC Entertainment. It seems as though their efforts have paid off, and the cast has subsequently taken to Twitter in order to celebrate.

Starring Stephen Amell, David Ramsey and Emily Bett Rickards, "Arrow" season four is scheduled to debut Wednesday, Oct. 7 at 8 pm EST on The CW.