ROME — Italy finally has formed a new government, a coalition of Silvio Berlusconi's forces and center-left rivals who forged an unusual alliance to break a two-month stalemate following inconclusive elections.

Enrico Letta, a center-left leader, will be premier in the government, which marks the latest political comeback by Berlusconi. The media mogul's conservative forces' participation is crucial to the new government's viability.

President Giorgio Napolitano said Saturday the government will enjoy the support of both chambers of the heavily polarized Parliament. Letta and his ministers, including Berlusconi's top political aide, will be sworn in Sunday.