The TV personality and actress, 47, began the ITV show by saying: ‘Can you believe they’ve let two of the naughtiest people on TV on live TV together.’
Rylan replied: ‘Now this is officially the end. Babe it is so lovely to see you.’
It comes after Holly Willoughby left the show last month ‘for the sake of her family’ after discovering she was the target of a foiled kidnap and murder plot and has since not been replaced permanently.
It came five months after Philip Schofield’s departure after his affair with a young male showrunner was made public, followed by claims of an increasingly strained relationship with his co-host.
Cat began her career as a co-presenter for the ITV children’s show SMTV Live, for which she won a BAFTA Children’s Award, and its spin-off chart show CD:UK.
A source previously told The Sun: ‘Cat is a seasoned pro and execs have been keen to get her in for a while. She takes live TV in her stride and his really witty and personable with guests.
‘She is comfortable interviewing both pop stars and politicians, so if it goes well she could be a much more permanent solution to Holly leaving. Cat would be safe captain to steady the ship.
‘Rylan was a resounding success too so fans can expect to see a lot more of him in the future.’
The bookies’ new favourite to be one-half of This Morning’s presenting team was revealed last Thursday as fans praised their presenting skills.
William Hill has announced that Rylan , 35, has 5/4 odds to take over from Phillip and more recently Holly.
Rylan, is currently guest-presenting the breakfast show alongside permanent host Josie Gibson .
His high odds will be welcome news to Rylan who has had a tough year due to his mother’s ill health.
Rylan is currently a rotating presenter from Monday to Thursday alongside Josie Gibson, Craig Doyle, Rochelle Humes , and Ben Shepherd.
However, the duo being permanent seems unlikely as Josie has just 50/1 odds of replacing Holly.
The favourite to replace Holly is Loose Women’s Christine Lampard.
William Hill also revealed the four people that are close on Rylan’s heels to replace Philip Schofield. Leading the pack is Dermot O’Leary.
Dermot, 50, is best known for his former presenting role on The X Factor. He currently co-presents This Morning with Alison Hammond, 48, and bookies say he has a 3/1 chance of continuing the role permanently.
The father-of-one has been linked to This Morning since 2014 when he served as a stand-in for Schofield.