Pierre Marinovitch (Serbian: Petar Marinović; 1 August 1898 – 2 October 1919) was a French World War I flying ace credited with 21 confirmed and 3 probable aerial victories.

He was the youngest French flying ace of the war, scoring his 5th victory at age 19 years and 169 days.

Pierre Marinovitch was born in Paris on 1 August 1898, to Velizar and Agripina Marinović (née Bronkov).

[2] Marinovitch's paternal grandfather, Jovan Marinović, served as Prime Minister of Serbia between 1873 and 1874, and was Serbian ambassador to France from 1879 to 1889.

[2] Seventeen-year-old Marinovitch enlisted in 27e Régiment de Dragoons on 12 February 1916.

On 10 January 1918, he was awarded the Médaille militaire (Order N.6239) in recognition of his third aerial victory.

By this point, the French press began referring to him as "The Youngest Ace" (Benjamin des As), because of his youth.

[3] Marinovitch was promoted to second lieutenant on 20 October, and awarded the Croix de guerre.