The support totals $35 million, which represents an increase on the previous $20 million promise.
Cardinal Pell also thanked the PM for the Government's decision to provide international pilgrims with free three-month visas for the event.
Cardinal Pell said: "The Prime Minister has been a very strong supporter of World Youth Day 2008 and we remain grateful for his personal commitment to the event and for the support of the government at all levels."
He said that the funding would go towards providing at least 3.5 million meals, and more than 200,000 backpacks to pilgrims. It will also fund additional showers and toilets at some accommodation centres.
Cardinal Pell welcomes John Howard’s strong support for World Youth Day (World Youth Day, Media Release, 250/8/07)
LINKS (not necessarily endorsed by Church Resources)
WYD seeks Sydney harbour site for opening (CathNews, 20/8/07)
Conversions off the WYD inter-faith agenda (CathNews, 16/8/07)
WYD to showcase faith potential to unite world (CathNews, 15/8/07)
Howard, Rudd promise $15 million more for WYD (CathNews, 13/8/07)
Condoms not on for WYD (CathNews, 30/7/07)
Love in the air for WYD (CathNews, 24/7/07)
Young Christians helping WYD pilgrims get piece of action (CathNews, 19/7/07)
Open hearts to WYD pilgrims, Fisher urges Sydney (CathNews, 17/7/07)
Can't lease Randwick for WYD, trainers tell club (CathNews, 11/7/07)
Randwick no place for pope, opines Cup winner Cummings (CathNews, 10/7/07)
Pope set to come, trainers to sue over WYD (CathNews, 5/7/07)
WYD Cross arrives amid Randwick turmoil (CathNews, 2/7/07)
Randwick trainers "emotional" over WYD compensation (CathNews, 29/6/07)
Trainers still jumpy about WYD (CathNews, 26/6/07)
Guy's WYD song to welcome cross and icon (CathNews, 25/6/07)
US leads Australia in WYD registrations (CathNews, 15/5/07)
Aussie idol to sing WYD theme song (CathNews, 14/5/07)