The 23-year-old is about to begin filming with the Channel 4 soap in the role of Denis Savage, a new regular character.
Tracini revealed the news on his Twitter page, explaining that he starts work at the show's base in Liverpool next week and will also be added into the Hollyoaks title sequence.
Meanwhile, a Hollyoaks spokesperson confirmed Tracini's casting to Digital Spy today but said that it was too early to reveal any details about the character of Denis.
However, a show source promised that Tracini has "great comic timing".
Hollyoaks unveiled the first member of the Savage family last December, when actress and singer-songwriter Abi Phillips took on the role of Theresa McQueen's best friend Liberty.
Earlier this year, meanwhile, viewers were introduced to Liberty's brothers Dodger and Will, played by Danny Mac and James Atherton, as well as her dad Dirk (David Kennedy).
Tracini has previously portrayed the roles of Darren "DK" Karrimore in BBC Three comedy Coming of Age and Spike Bannon in Boomerang's My Spy Family.
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Watch a clip of Joe playing DK in Coming of Age below: