Katie Ledecky emphatically announced herself to the 2016 Rio Olympics audience with a dominating, record-setting performance in the 400-meter freestyle on Sunday night.

Ledecky broke her own world record, beating her closest competitor by nearly five seconds. It was her second medal of the games — she won silver in the 4x100m freestyle relay on Saturday.

The 19-year-old is far from done, and hopes to win three more gold medals at the Rio Olympics.

Katie Ledecky is hoping for five medals at the Rio Olympics. Getty Images

How to watch (TV coverage on NBC, live stream on NBCOlympics.com)

All times Eastern

200m freestyle

Semifinal: Monday, Aug. 8 – 9:03 p.m.

Final: Tuesday, Aug. 9 – 9:19 p.m.

4x200m freestyle relay

Heats: Wednesday, Aug. 10 – 1:31 p.m.

Final: Wednesday, Aug. 10 – 10:55 p.m.

800m freestyle

Heats: Thursday, Aug. 11 – 12:26 p.m.

Final: Friday, Aug. 12 – 9:20 p.m.