Russian President Vladimir Putin met mercenary leader Yevgeny Prigozhin after the failed Wagner group mutiny last month.
Prigozhin, who heads the mercenary group, was among 35 Wagner commanders invited to the meeting in Moscow, Kremlin spokesman Dmitry Peskov confirmed the matter to media.
He said that President Putin had given an "assessment" of the Ukraine war effort and the mutiny, reports BBC.
The rebellion by Prigozhin, launched on 23 June, lasted only 24 hours.
Under a deal to end the mutiny, which saw Wagner troops seize a city and march on Moscow, charges against Prigozhin were dropped and he was offered a move to neighbouring country Belarus.
There had been very public infighting between Wagner and Russia's ministry of defence over the conduct of the war.
Prigozhin had repeatedly accused the ministry of failing to supply his group with ammunition.
But on Monday, Peskov said the Wagner chief was among the commanders who were invited to the Kremlin five days after the mutiny collapsed.
According to the spokesman, Prigozhin told Putin that Wagner unconditionally supported him. The Wagner chief's current whereabouts are unclear.
Bd-pratidin English/Golam Rosul