Minister of Pacific Peoples Peseta Sam Lotu-Iiga will also attend the funeral.
However, details of who will speak at the funeral are not expected to be released until shortly before the service tomorrow.
Collins' cousin and fellow former All Black Tana Umaga accompanied his body as it was repatriated from France.
The rugby star, 34, and his partner Alana Madill were killed in a car crash in France earlier this month.
Collins' agent Tim Castle has confirmed Alana's father Darrell and older sister Nora will attend the service tomorrow.
Ms Madill and Collins' baby daughter Ayla was in a stable but "worrying" condition overnight, French authorities said.
"The child's condition remains worrying but hasn't changed," said Yvon Calvet, the Beziers public prosecutor.
Ayla's condition has not improved in the six days since the prosecutor's last public statement.
Donors have pledged more than $40,000 to the Jerry Collins Memorial Fund on the Givealittle website.