Created by Bandstand and brokered by PHD, the campaign debuts on Channel 4 tomorrow evening during 8 Out of 10 Cats Does Countdown at 9.30pm.
Along with Redmayne, who in the film plays Newt Scamander, an eccentric employee of the Ministry of Magic in the 1920s, the ads will feature the likes of Lauren Laverne, Alex Brooker and Davina McCall.
Sam Tootal is the creative/director for Bandstand, while Jack Byrne produced the spots through Giant Owl Productions.
Fantastic Beasts is set to be one of the year’s biggest films when it hit cinemas on 18 November. Directed by David Yates, who helmed the last four Harry Potter films, it is written by J.K. Rowling herself, marking the author’s first screenplay. Rowling has confirmed that it will be the first in a series of five.
Chris Braithwaite, agency principal at Channel 4 said: "With Harry Potter fans the world over looking forward to Fantastic Beasts, we’re thrilled to launch this new talent-led ad campaign on Channel 4.
"We all have our favourite moments from the books and films and these ads are the perfect way to celebrate J.K. Rowling’s Wizarding World ahead of the film’s release."
Bauer Media, meanwhile, has also partnered with Warner Bros. and Virgin Atlantic to broadcast a show on Magic live from a plane.
The campaign will see the station’s breakfast show Magic In The Morning become Magic In New York. Next Tuesday, 8 November, the show will be broadcast at first live from London Heathrow Terminal 3 and the Virgin Atlantic Clubhouse. It will continue as it moves to a Virgin Atlantic aircraft; the presenters will then take the audience into the sky on the flight to New York.
The partnership will continue for three weeks, during which time the show will be broadcast from a studio in New York. It will feature content inspired by the film, including competitions to win a trip to the city.
Abby Carvosso, group MD at Bauer Advertising, said: "Our team of cultural marketing experts have built on our Magic in the Morning show to create an exciting new campaign that will bring our audience with us on our journey across the Atlantic and into the heart of the film.
"We believe it’s the first time a media owner has broadcast live from a plane in the sky, and is the kind of innovative solution that gets our team excited, delivers results for our clients, great content for our consumers and above all cultural impact."