As the biggest crowd of protesters to date besieged Cairo, the news filtered through that the much- hated president had finally been persuaded to step aside after 29 years in charge.
He left the capital this morning bound for Red Sea resort Sharm El Sheikh and state TV announced shortly after 4pm GMT that he had resigned.
It is understood that the Egyptian army will rule alongside Vice President Omar Suleiman until elections can take place later this year.
Power in numbers: Egyptian anti-government protesters march in the coastal city of Alexandria earlier today just hours before Mubarak resigned
EnlargeThe extraordinary scenes unfolded in Tahrir Square on the same day that TV news station Al Arabiya reported that Mr Mubarak had left for an 'undisclosed location'.
At last: Crowds erupted in a wave of celebration as news filtered through to Tahrir Square that after fleeing Cairo Mubarak had stepped aside
'The people ousted the president,' chanted a crowd of tens of thousands outside his presidential palace in Cairo upon hearing the news.
Several hundred thousand protesters massed in Cairo's central Tahrir Square exploded into joy, waving Egyptian flags, and car horns and celebratory shots in the air were heard around the city of 18 million in joy after Vice President Omar Suleiman made the announcement on national TV just after nightfall.