Count Grigory Grigoryevich Orlov (1734–1783) was the lover of Empress Catherine the Great of Russia who fathered two of her children. He led the coup which overthrew Catherine's husband Peter III of Russia, and installed Catherine as empress. For some years, he was virtually co-ruler with her, but his repeated infidelities and the enmity of Catherine's other advisers led to his fall from power.