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.
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