The wife of king Acastus of Iolcus. She fell in love with Peleus but he did not return her love and she calumniated him before her husband. She told him that Peleus had attempted to seduce her, but Acastus was reluctant to kill the man whom he had purified. Instead, he took Peleus on a hunting trip, hid his sword, and abandoned him in the woods. There, he was attacked by centaurs and they would have overwhelmed him but Chiron returned the sword, and Peleus repulsed the attack.
Peleus took revenge by raiding and pillaging Iolcus, assisted by the Dioscuri, and then killed Astydameia; he dismembered her body and marched his army between the pieces.
- Aken, Dr. A.R.A. van. (1961). Elseviers Mythologische Encyclopedie. Amsterdam: Elsevier.
- Pseudo-Apollodorus. The Library iii, 13.3, 13.7.