Quintus Caecilius Metellus Celer (before 103 BC or c. 100 BC – 59 BC) was a consul in 60 BC and son of Quintus Caecilius Metellus Nepos, or, according to some, the son of Tribune Quintus Caecilius Metellus Celer while the latter is the son of Quintus Caecilius Metellus Nepos. Previously he held the offices of Praetor and Augur in 63 BC.
During the Third Mithridatic War (73-63 BC) against Mithridates VI of Pontus and Tigranes the Great of Armenia, Metellus Celer was a lieutenant of Pompey. In the winter of 66 BC Oroeses, king of the Caucasian Albanians attacked the forces of Pompey while they were celebrating the festival of the Saturnalia in their winter quarters in Lesser Armenia. Pompey had split his army into three divisions. Oroeses attacked Metellus Celer was in charge of one of them and of the custody of Tigranes the Younger of Armenia. Metellus vigorously repulsed Oroeses while Flaccus and Pompey, who were in charge of the other two divisions, defeated the other Albanians.
In 63 BC, when Catilinarian Conspiracy was discovered Catiline, its leader, was indited for violence. He went to stay at the house of Metellus Celer to allay suspicions as Metellus was the praetor. It did not work. Metellus then brought several conspirators to trial by virtue of a decree of the senate and imprisoned them. Cicero entrusted matters outside Rome to Metellus Celer. He was sent to the district of Pisa (in Etruria) with three legions. On learning that the rebels were advancing towards Pistoia to flee to Cisalpine Gaul (in northern Italy) he encamped at the foot of the mountain they had to come down from for their passage to Cisalpine Gaul, while the consul Antonius had his troops at their rear. He besieged Faesulae (Fiesole), the base of Catiline, together with Antonius. The two men were encamped in two different places. Catiline attacked Antonius instead of Metellus, even through the former had a larger army. References to Metellus Celer during the conspiracy were also made by Cicero and Valerius Maximus.