The 33-year-old actress died on July 23 surrounded by family.
The family distributed a message through an actors agency in Dublin, "It is with great sadness and heavy hearts we share the news of the passing of our beautiful daughter and sister, Danika 'Nika' McGuigan.
"After a brief but brave battle against cancer, Nika passed away peacefully in the early hours of Tuesday 23rd July, surrounded by her loving family.
"As a family we are devastated and ask for complete privacy during this difficult period to allow us to grieve for our Nika."
Danika was a successful actress and recently completed filming Wildfire.
Retired boxer, Barry, shares daughter Nika with wife Sandra, as well as sons Shane, Jake and Blane.
In an article from 2005, it revealed that Danika was first diagnosed with Leukaemia when she was 11-years-old.
Both Barry and wife Sandra's fathers passed away after battling cancer at young ages.