Mitzeee, played by Rachel Shenton, found out that she was pregnant last month. She was shocked to discover that her dead partner Riley Costello was the father and the pregnancy was much further along than she thought.
Hollyoaks asked viewers to come up with names for the unborn child. Executive producer Bryan Kirkwood picked viewer Lizzie's suggestion Phoenix.
Mitzeee left the show a couple of weeks ago while she was still pregnant, but the baby will be referred to as Phoenix when it is mentioned in a future script.
Shenton recently spoke with Digital Spy about her Hollyoaks exit, saying: "It's a little bit surreal, actually. Hollyoaks really is such a great place to work, and there was nothing bad whatsoever about my time there.
"I loved my job, I loved everybody that I worked with, and I was blessed with great storylines. Career-wise, it's probably one of the hardest decisions I've had to make so far."
Digital Spy Soap Scoop video - Amie Parker-Williams reveals the biggest storylines coming up in EastEnders, Coronation Street, Emmerdale and Hollyoaks next week: