You don't have to be 20. They accepted my application and I will only just be 18 when I start my course. Word of warning though; about a week ago I received a letter saying 'thank you for your application etc' 'we'll notify you in august' but ALSO 'EU applicants, in addition to meeting the competitive entry requirements, must also have attained a place to study veterinary medicine in a university in their own country to be eligible for consideration for admission to UCD'. There is no mention of this on the website, which is very misleading but basically, if you're not doing the irish leaving cert, you must have at least one other offer to go to UCD. xxx