The actor tweeted about his disappointment over the show's axe, and tried to tempt different TV networks into picking up the DC Comics property, reported Screen Rant.
"#SaveConstantine," tweeted Amell. "Hey TV Networks/Netflix and the like... If you pick up the show, I'll guest star."
"Constantine" star Matt Ryan then replied to Amell, saying it would be "a real pleasure" to appear together on the show.
"Constantine" was cancelled alongside fellow NBC freshman series "State of Affairs".
The show's future has always been surrounded by uncertainty, with the network only ordering 13 episodes for season one instead of 22.