The cabinet's main task will be to ease sectarian and political tensions to avert further violence, adopt an election law agreed in the Qatar talks and supervise next year's poll.
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"Finally!" a 21-year-old Beirut man, who gave his name only as Ahmed, said of the new cabinet. "Hopefully it will be a real national unity government and they won't waste time fighting at the table and will sort out the problems of the Lebanese."
The United States welcomed the formation of a cabinet but said it would not deal with cabinet members from Hezbollah.
"This cabinet does include members of Hezbollah, as did the last one. We will not deal with those members of the cabinet. But we look forward to working with the prime minister, as well as his new foreign minister," State Department spokesman Sean McCormack told reporters in Washington.
European Union foreign policy chief Javier Solana also hailed the formation of the new government, which he said marked a "key achievement."
"Important decisions need to be taken in the coming weeks and there is a lot of work to be done," Solana said in a statement, reiterating the EU's support to Siniora.
Suleiman is due in Paris for Sunday's launch of French President Nicolas Sarkozy's Mediterranean Union project, his first foreign trip as president. He is expected to hold talks there with his Syrian counterpart Bashar al-Assad.
Assad's presence at the summit, which Israeli Prime Minister Ehud Olmert will also attend, marks French recognition of Syria's role in facilitating a compromise in Lebanon.
Damascus had given its blessing to the Doha deal, which effectively translated into political gains the military victory Hezbollah and its allies had won against their Western-backed foes in street fighting in Beirut and elsewhere earlier in May.
With the government in place, Suleiman is expected to call rival leaders for round-table talks on divisive issues, with the fate of Hezbollah's weapons foremost among them.
Hezbollah maintains a formidable guerrilla army that fought off Israeli forces in a 34-day war in 2006.
Its domestic detractors say Hezbollah has had no reason to keep its weapons since Israel pulled out of Lebanon in 2000. Hezbollah and its allies argue that it needs its arsenal to deter and defend Lebanon against possible Israeli attack.
