Hollywood celebrities took to social media and reacted to the news of United States President Joe Biden's decision to conclude his re-election bid. The decision comes after a reportedly faltering campaign, amid mounting concerns about his age and fitness. He has endorsed US Vice President Kamala Harris as the presidential nominee for the Democratic Party and called on Democrats to "come together and beat" Republican presidential candidate Donald Trump. From singers to actors, here’s what the who’s who of Hollywood had to say. 

Mark Ruffalo, known to play Hulk in the Marvel Cinematic Universe, wrote on X, “Okay everybody, now we have our marching orders and time to hit the trail running. No to Trump/Vance. No to the right-wing Christian religious takeover of our nation. Nothing wrong with Christianity; just shouldn’t be running a nation birthed from freedom of religion.”