The Harry Potter actor publicly announced his support of party leader Nick Clegg in the run-up to the May General Election, but has since been left disappointed by the party's reneging of its pledge to protect students.
A Liberal Democrat source told the Daily Mail: "Daniel does not in any way support the violence of the rioters, but to say he is underwhelmed by his party is an understatement. Like millions of others he was under the impression that the Liberal Democrats had no plans to increase the cost of studying.
"While Daniel will never have to worry about his finances again, a tuition fee hike is a serious issue which will directly affect many of his fans. And these fans have contacted Daniel to tell him so in their droves. Quite frankly, he is beginning to regret his loyalty now."
Radcliffe, who is estimated to be worth over £28.5 million, is also said to be upset that university colleagues without his wealth may have voted for the Liberal Democrats based on his endorsement.
A friend said: "Daniel has many friends at university. It’s been a topic of conversation that has been raised on numerous occasions, and he has confessed that he feels genuinely uncomfortable about the fact that his support for the party could have affected people’s choice of vote."