List of Famous people with last name Guarini

Justin Guarini is an American singer, musician, actor, host and record producer, who in 2002 was the runner-up on the first season of American Idol. In 2015, he began appearing in TV commercials as "Lil' Sweet", a character used to advertise the Diet Dr. Pepper soft drink.

Alfredo Guarini (1901–1981) was an Italian screenwriter, film producer and director. Guarini is noted in particular for his management of the career of the Italian actress Isa Miranda, who he eventually married. In the mid-1930s he was responsible for persuading her to work in a variety of different countries to build up a greater international profile after her breakthrough success in Everybody's Woman (1934).

Camillo Guarino Guarini was an Italian architect of the Piedmontese Baroque, active in Turin as well as Sicily, France, and Portugal.

Giovanni Battista Guarini was an Italian poet, dramatist, and diplomat.