Royal Baby: Hollywood's Best Tweets

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Kate Middleton

Albert Brooks, Ellen Page and Jeff Daniels were among those taking to Twitter to react to the birth of the British heir.

The Duchess of Cambridge Kate Middleton gave birth to a baby boy today.

Hollywood was quick to start both cheering and mocking the royal offspring, which is now third in line to the British throne.

STORY: 5 Things to Know About Kate Middleton and Prince William's First Child

Some celebs even noted that the new prince shares their birthday.

Here are some of the best reactions from Twitter: