A stream of neighbours and friends gathered from around 3.30pm outside Ms White’s grandfather’s funeral directors on the village’s main street to pay their respects.
Ms White’s body was found by friends at her home in Los Angeles, California, on September 28.
One of a number of suicide notes found in her house apparently referred to her love for ex-boyfriend Mr Carrey, after their on-off relationship had broken down.
Hollywood star Carrey flew into Dublin Airport yesterday morning for the funeral today.
A private jet carrying the Dumb and Dumber star, plus a small entourage, landed at Dublin Airport at 2.20am.
The jet had begun its journey several hours earlier in Van Nuys, LA, where police have been investigating Ms White’s death.
An autopsy was conducted in California. However, results of toxicology tests will not be known for some weeks.
This evening, Ms White’s siblings, James, Lisa, Sarah, Larina and Tadhg, as well as her grandparents James and Lilly, stepmother Bríd, and mother Brigid, and other family members, shook hands with mourners who filed past her closed coffin, on which a single framed portrait of Ms White rested.
The 30-year old budding actress is to be laid to rest tomorrow in her native Cappawhite, beside her late father Pat, who died in 2012, following a long battle with cancer.
The family plot in the local cemetery was prepared earlier yesterday ahead of the burial service.
A large gathering of photographers and reporters gathered outside White’s Funeral Directors in Cappawhite, while a large media presence is also expected to be in attendance today at Our Lady of Fatima Church in the south Tipperary village.
Mr Carrey, who became a star after appearing in box office hits, Ace Ventura Pet Detective, and The Truman Show, began a relationship in 2012 with Ms White, who was working as a make-up artist on film sets.
The pair split in 2013 but rekindled their love for one another before parting again last month.
It emerged last week that Ms White was married to US cameraman Mark Burton. The married couple had been separated for some time.
Ms White’s sister Lisa, and her stepmother Bríd, returned to Cappawhite this week after travelling last week to California to repatriate her body.
Cathriona’s mother Brigid, who has lived in England for the past few years also travelled to Cappawhite.
Ms White’s requiem mass is to take place today at 11.30am.
A statement from the Catholic a Communications Office said: “As Our Lady of Fatima Church in Cappawhite has a limited capacity of 300 seats, the inside of the church has been reserved for family, loved ones and parishioners only.
“An external loud speaker, and a small reserved area for media cameras, will be available on the church grounds,” the office added.