Experts have used high-tech scans to unravel the secrets of the mummy in this colourful casket. It hadn't been opened for 3,000 years...
Here's one of the first scans, which revealed the mummy was of a woman called Meresamun, who was a singer in a temple.
Check out these amazing 3D images! They show the linen and bandages around the body, and even showed some of the mummy's internal organs.
Meresamun was about 1.65m tall, and would have been in her late 20s or early 30s when she died.
The scans showed the stones which were placed over her eyes after she died.
And believe it or not, the scientists say they can even tell that Meresamun was really pretty!
But there is one mystery that still hasn't been solved. The scans show Meresamun was in very good health, so the reason why she died is still unknown...