Marcus Atilius Regulus Calenus was a fourth-century BC Roman politician.
[1][2] He was elected consul in 335 BC with Marcus Valerius Corvus as colleague, Corvus serving as consul for the fourth time.
[1] During the consulate, the war against the Ausoni and Sidicini ended, and the Senate asked to be entrusted to Valerius Corvus alone.
[2] After the victory of Corvus at Cales, he requested and obtained that the command of the army be entrusted to both consuls.