Frost is in line to make more history when she competes in the Gold Cup on Friday.
Frost made history in becoming the first woman jockey to win a Grade One race at the Festival with the valiant Paul Nicholls-trained Frodon in the Ryanair Chase whilst Kelly won the Grade Three Handicap Chase on Siruh du Lac, trained by her stepfather Nick Williams.
But Frost got one last effort out of her mount to win by one-and-a-quarter lengths.
"Just look at what he's done there - deny that he just loves racing".
"Sometimes fairytales come true and Frodon is my heart", added Frost. He will deserve every single high five, pat, carrot and Polo. She said afterwards: "I could get used to this'".
"I don't know what it is about him but he's fearless and he wants it and he's competitive".More news: James Bond to drive electric Aston Martin in new film - media reports
In the following race, Paisley Park clinched the Stayers' Hurdle to whip the crowd into a further frenzy.
Female jockey Bryony Frost and blind owner Andrew Gemmell each received the acclaim of the Cheltenham Festival crowd with Thursday winners.
With former champion hurdler Faugheen in the field he faced his stiffest test to date, but Paisley Park survived a last-flight blunder to account for last year's beaten favourite Sam Spinner by two and three-quarter lengths, with Faugheen only third.
Paisley Park nearly died following an attack of colic two years ago. He's unbelievable. I love you mate. He's good, so let's enjoy him over hurdles and he's only seven.
"I'm just delighted he's done it and he's a young horse going forward".
Later in the day, Lizzie Kelly claimed a fine victory on Siruh Du Lac as bookmakers took yet another big hit, with estimates that yesterday's events cost the industry £50million.More news: Global Artificial Intelligence for Healthcare Applications Market 2019 Segmented by Potential Applications
They set the pace throughout but were briefly headed late on by Aso. I was so emotional.
"I was nervous as I didn't want to muck it up".
"Wonderful. It's fantastic. I'm aware we're on air so I won't say what I want!" he told BBC Radio 5 live.
Frost, who is based at Nicholls' yard, rode her 100th victor on Monday and had won once at the Festival before, on Pacha du Polder in the Foxhunter Chase in 2017.
Hobbs said: "He has been phenomenal and our flagship horse for a bit now".More news: Pundits applaud Kubica's F1 comeback at the Australian GP