General Hospital is looking to add a new character to its canvas, but exactly who that character is remains a mystery.

According to the casting notice, the unnamed female character, which will be a contract role, is a mid-to-late 20something "Caucasian. Blonde. Beautiful, passionate, complex."

There is speculation that this character could be Serena Baldwin, as her return has been the subject of Internet speculation for some time. Talk of the character's so-called imminent return heated up when Kin Shriner (Scott Baldwin) confirmed earlier this week that he'd be returning to GH. Shriner's alter ego is Serena Baldwin's father, a character not seen since the GH spinoff, Port Charles, ended its run in 2003.

Serena was born on-screen on December 7, 1993. So if this mystery blonde is really to be Serena, the character would have to be "aged" slightly.

The role -- whoever she turns out to be -- will start taping in March.