Ryan is joined by Niamh Coyne and John Shortt who both progressed this morning as well.
Portarlington's Shane Ryan, along with Niamh Coyne and John Shortt have all made it through to the semi finals of their respective events at the European Aquatics Championships in Belgrade.
Ryan booked his place in the semis after an 8th place finish in the time of 48.69 in the 100m Freestyle.
The mixed 4 x 100 metres medley relay team has also qualified for the final.
Clare Cryan was the first diver in action for Ireland on the 1 metre Springboard.
Cryan finished 11th after five rounds and qualified for the final Darragh Greene will swim in the final of the 100 metres breaststroke this evening.
Nathan Wiffen has booked his place in tomorrow's final of the men's 800 metres freestyle.
Offaly SHC: Four Clubs Fighting For Two Semi-Final Places
Lowry Makes Steady Start At Wentworth
In Form Town Return To League Of Ireland Action Tomorrow
McNulty Set For Another Year With Laois Footballers
There Are Very Strict Rules When It Comes To International Sport - Tanaiste
Westmeath SFC: Great To Win At The Weekend - John Heslin
2027 Irish Open To Take Place Next July
Offaly’s First All-Ireland Winning Hurling Manager Andy Gallagher Dies Aged 89
Laois SFC: Killeshin Deliver Knockout Blow To Portlaoise
Westmeath SFC: Moate All Whites Turn Attention To County "Standard Bearers"
Town Continue Rich Vein Of Form With Creditable Students Draw
Offaly SFC: Shamrocks And Tullamore Secure Semi-Final Spots
John Heslin Aiming To Feature For Westmeath Next Season
Westmeath SFC: St Loman's Mullingar And Moate All Whites Progress
Athlone Town Move Closer To Women's Premier Division Title
Alex Dunne Keeps F2 Title Hopes Alive With Spanish GP Podium
Trump To Lift US Tariff On Irish Whiskey After Talks With Shane Lowry
Lowry Breaks Title Drought With Magnificent Irish Open Victory
Shane Lowry Leading The Way At The Irish Open