Three hundred people attended the Mass held by Father Tadhg Furlong, Parish Priest of Cappawhite Parish, in the Archdiocese of Cashel & Emly.
The ceremony was reserved for family and friends, including her ex-partner Jim Carrey.
The actor joined Cathriona White's family and friends in the village of Cappawhite, Co Tipperary, where she is being buried beside her late father Pat.
The 30-year-old make-up artist was found dead in a house in Sherman Oaks, California, on September 28 with Carrey describing her death as like being "hit with a lightning bolt".
Her death was being treated as suicide with the Los Angeles County Coroner's Office leading the investigation.
In 1985 Cathriona was baptised into the Christian community.
The Homily stated: "We assemble now in a very different atmosphere to welcome her home.
"We gather in silent, sad, grief-stricken fáilte."
The first reading was read by her aunt anc came from the book of Ecclesiaste:
"There is a season for everything, a time for every occupation under heaven:
A time for giving birth, a time for dying;~
a time for planting, a time for uprooting what has been planted.
A time for tears, a time for laughter;
a time for mourning, a time for dancing.
A time for throwing stones away, a time for gathering them up;
a time for embracing, a time to refrain from embracing.
A time for searching, a time for losing;
a time for keeping, a time for throwing away.
A time for tearing, a time for sewing;
a time for keeping silent, a time for speaking.
A time for loving, a time for hating;
a time for war, a time for peace.
God has made everything suitable for its time."
The Homily concluded that: "The news of Cathrioina's death has prompted everyone to remember something of her life's journey.
"It's good to count the blessings God gives.
"For Cathriona: Cappawhite: school, Junior Legion of Mary, games, altar server, visits to friends. Clonmel: the games again, the hair stylist, the beautician.
"Then to England for some years; later to California: the photography, the back-stage work. Cathriona's approach to life was to take on, to challenge the county, the country, the world. You remember the outgoing personality; the strong-willed, determined character.
"Cathriona was a light to so many.
Something of the light has gone out.
"Yet much remains. The light continues to shine. The light of love lives on; the love you had for Cathriona; the love she had for you."