Ciara Renee, who will play Hawkgirl in "DC's Legends of Tomorrow," took to Twitter to announce that she and some of her "Legends" co-stars will appear in the season finale of "The Flash."

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Both "Arrow" and "The Flash" have already featured a few stars who will move onto "Legends of Tomorrow" this fall, including Brandon Routh's the Atom and Caity Lotz's Sara "Canary" Lance. Routh and Lotz will be joined on the spinoff by "The Flash" veterans Wentworth Miller (Leonard Snart/Captain Cold), Dominic Purcell (Mick Rory/Heat Wave) and Victor Garber (Martin Stein/one-half of Firestorm on "Flash") as well as newcomers Renee (Hawkgirl), Arthur Darvill (Rip Hunter) and Franz Drameh.

Set to air this fall, "Legends of Tomorrow" will be executive produced by "Flash" and "Arrow" vets Andrew Kreisberg, Greg Berlanti and Marc Guggenheim.

"The Flash's" season finale will air on Tuesday, May 19 at 8 pm EST on The CW.