'Mad Men' star John Slattery and pop singer Gabriella Cilmi will be appearing on 'Tubridy Tonight' this Saturday.

American actor Slattery will be talking about his Irish roots and the success of the television series 'Mad Men', while Cilmi will be performing her single 'Sweet About Me'.

Also joining presenter Ryan Tubridy on the show is golf star Padraig Harrington, who is giving his first major television interview since winning the British Open and PGA earlier this year.

Television presenters Eamonn Holmes and Ruth Langsford will also be dropping in for a chat, as will comedian Jason Byrne.

Speaking about the show, Ryan Tubridy said: "We have a fantastic line-up this week and I’m thrilled that Padraig Harrington is joining us tomorrow night. He’s had such a big year so I’m looking forward to catching up with him."

"And as a huge 'Mad Men' fan I’m delighted that John Slattery is coming over for the show. He’s such a talented actor having stared some of the biggest television series’ in recent times from 'Desperate Housewives' to 'Sex & the City' and 'Will & Grace'."

For more on 'Tubridy Tonight' click here.