Jason O'Callaghan is an internationally known entertainer, psychologist, author, journalist, and singer with over 15 years’ experience on stage and ten years in the national and international media.
Once the most famous gossip columnist for Ireland's biggest newspaper, Jason has written two bestselling books, produced two big band albums, worked with countless celebrities, produced and provided entertainment at over 1500 events firstly as a singer and producer with The Irish Rat Pack and in recently years as a comedy hypnotist and motivational psychologist.
In 2006 he left the media to retrain as a psychologist where he graduated with a 2.1 honours degree in psychology. Followed by a Master’s degree in applied psychology from Trinity College Dublin. During this time, he was also named on the college Roll of Honour for his research with cancer patients.
In 2012 he founded The D4 Clinic Dublin which is now widely regarded as Ireland's premier psychology clinic specializing in clinical hypnotherapy. The clinic appears both nationally and internationally within the media as experts within the field.
In 2014 Jason combined both his stage work and his clinical work by launching his comedy hypnosis show which he currently performs at over 120 events per year.
Amanda Couch McCarthy
Jason was brilliant. My guests are still on about how brilliant he was and how funny the night was!! it was defo worth it as how he came on after the meal and before the band. . there was no slump in the day he got the crowd involved! it was outstanding and i highly recommend him for anyone looking for something different thanks again Jason More...
Tanya F Foley
jason did a show at our wedding he was amazing everyone loved it. cant thank him enough
We booked Jason for our pre meal entertainment and it was one of the best decisions we made. From the initial handling of our booking query, right through the delivery of his show, it was faultless. As it was a pre meal show, it was important to us that Jason set the tone that we wanted for the rest of the day and he didn't fail us. In fact, people laughed so much and had so much fun, it became a huge topic for the rest of the night and following days. To quote a family member of mine "you had a wedding that everyone will remember for years" Jason played a huge part in achieving that and thank you so much from Noel and Éilish. More...
Highly recommended wedding entertainment almost 2 years after wedding people still talk about Jason
What a great Show! Couldn’t recommend him highly enough! Can’t wait to see him again Was bloody brilliant!
The ultimate show stopper. Your guests will be talking and thanking you for weeks. Jason done our wedding nearly two weeks ago. Anyone that is lucky enough to have Jason for there big day, hold onto your hats you are in for a treat. Jason was outstanding. i booked jason nearly two years ago & thankfully i was lucky enough to get our date, i would go as far to have changed the wedding date just to get him. we can't wait to see the wedding video, I can only imagen . thanks Jason for the most amazing night. More...
"Jaw dropping","Has to be seen to be believed","I have never seen anything like this" - Jason came to my 50th party at Blackwater Castle in Cork and every single guest was awestruck. Not only was it mysterious, enthralling and absolutely original - it was also hilarious; Jason explained to the audience what was happening throughout but also demonstrated the power of the mind with the act. This will be talked about for years to come - Jason's skills as both a hypnotist, an entertainer and a scientist were truly remarkable. More...
Jason made my 21st on Friday night! Absolutely amazing! People were talking about it all night and I’m sure they won’t stop any time soon. Thank you so much Jason for making my night so special! More...
Totally amazing jason from start to finish so glad we booked you for our big day you are the talk of dundalk from Siobhan and Gareth mccourt