Allison Janney on Sunday took home the best supporting actress Oscar for her turn as the cold, sardonic mother of disgraced figure skater Tonya Harding in "I, Tonya" -- capping a sparkling awards season which saw her win all major prizes.

Allison Janney on Sunday won the Golden Globe for best supporting actress for playing the mother of disgraced figure skater Tonya Harding in "I, Tonya."