the man, woman, etc. of the moment
(the) man of the moment
A man who is currently being celebrated, honored, or admired by others, especially for a recent victory, accomplishment, or other cause for celebration. (Feminine: "woman of the moment.") Jake was man of the moment at the office after securing the biggest customer their business had ever had. It's a surprise birthday party for you, Rob! You're the man of the moment!