Thekla (Θέκλα; died c. 823) was the first empress consort of Michael II of the Byzantine Empire.
According to Theophanes the Confessor, Thekla was the daughter of an unnamed strategos of the Anatolic Theme, where Michael served.
George Hamartolus and Theophanes report him marrying the sister of the Empress Theodora.
Joseph Genesius records Theophobos marrying the sister of the Emperor Theophilos.
Michael was imprisoned but his co-conspirators organized the assassination of Leo in the cathedral Hagia Sophia on Christmas in 820.