| Mian'en | |
| Prince Ding of the First Rank 和碩定親王 | |
| Succession: | Head of the House of Prince Ding peerage |
| Reign: | 1776–1822 |
| Reign-Type: | Tenure |
| Predecessor: | Miande |
| Successor: | Yishao |
| Birth Date: | 18 September 1747 |
| Posthumous Name: | Prince Dinggong of the First Rank (定恭親王) |
| Full Name: | Mian'en (綿恩) |
| House: | Aisin Gioro |
| Father: | Yonghuang |
| Mother: | Lady Irgen Gioro |
| Spouse: | Lady Fuca |
| Issue: | Yishao Yizhi |
Mian'en (綿恩; 18 September 1747 – 18 July 1822) was Qing dynasty imperial prince and the second son of Yonghuang.
Mian'en was born on 18 September 1747 to lady Irgen Gioro, Yonghuang's secondary consort. Mian'en showed high potential in martial arts in the childhood, thus was favoured by the Qianlong Emperor.[1] In 1755, he received a yellow horse-riding jacket at the age of eight. According to the relation of Choson Korean ambassadors, Mian'en had more abilities than his younger uncle, Yongyan.[2] According to the relations of Prince Li, Zhaolian, Mian'en was a specialist in weapons at the age of 50.[3]
He inherited the peerage as the Prince of the Second Rank after the demotion of Miande in 1776.[4] In 1793, he was promoted to the Prince of the First Rank, thus became the earliest promoted imperial grandson.[5] In 1799, Mian'en was one of the initiators of the general control of Heshen's property after the official was denounced. Heshen's relatives contradicted him by defending official's deeds.[6] In 1803, Mian'en gave approval to imperial guards on the Gate of Divine Prowess. His son was granted a title of the fourth-ranking prince shortly after the incident. Mian'en died on 18 July 1822 and was granted posthumous title of Prince Dinggong of the First Rank (， meaning "stable and reverent").
Mian'en's primary princess consort was lady Fuca, daughter of vice-colonel Fujing.