the life and soul of the party
US /ðə laɪf ænd soʊl əv ðə ˈpɑːr.t̬i/
UK /ðə laɪf ænd soʊl əv ðə ˈpɑːr.t̬i/

1.
a person who is energetic and enthusiastic and who makes a social event or gathering more lively and enjoyable
:
•
Sarah is always the life and soul of the party, making everyone laugh and dance.
•
Even though he's usually quiet, at parties, he becomes the life and soul of the party.