After impressing with a brief stint on UK soap Hollyoaks, the Dubliner is back for more.
And it couldn't be more different to her role as troubled Debbie on gritty Irish crime drama Love/Hate.
"I'm doing Hollyoaks until the end of November so it's exciting," Susan (24) told the Herald.
"I filmed for the month of June and then I had a break and now I'm back for the next few months."
The IFTA winning actress's first scenes on the popular soap will air next week as her character, a young Irish mother named Chloe, arrives to cause trouble.
It's a long way from the usual men in her life, such as violent gang leader John Boy and cheating Tommy on award-winning drama Love/Hate.
This time around, Susan's on-screen persona is getting to grips with Hollyoaks' gay character John Paul McQueen.
Susan plays fun-loving Chloe who had a child with John Paul while he lived in Dublin.
John Paul had taken their baby son Matthew back to England with him as Chloe felt unfit to be a mother, but now she is back.
"She's really fun, it's something different for me," explained the Malahide native.
"It's definitely a challenge for me, but I love a challenge."
While Chloe may be more fun to play, she too knows how to get her way and is in the village to try and get money out of good-hearted John Paul.
James Sutton, who plays John Paul, described Susan as a "lovely young Irish actress" and said they "had a great time filming together".
Susan was enjoying time off this week as she jetted back to Dublin for a break and to help judge the best dressed competition on Ladies' Day at the Dublin Horse Show.
The model-turned-actress is living full-time in London and she says that the reaction to Channel Five's airing of Love/Hate has been electric.
"I'm living there so there's been a great reception," Susan told the Herald.
"I haven't been on it in the UK yet as I don't come in until season two, but my friends over there are looking forward to seeing me in it."
RTE this week launched their brand new autumn schedule with the hotly anticipated fourth series of Love/Hate taking a central role.
"I'm really excited about it," said Susan.
"There are a few new actors on it now so it's really good and fresh."