Ukrainian Ye or Round Ye is a character of the Cyrillic script. It is a separate letter in the Ukrainian alphabet, the Pannonian Rusyn alphabet, and both the Carpathian Rusyn alphabets; in all of these, it comes directly after Е. In modern Church Slavonic, it is considered a variant form of Ye (Е е). Until the mid-19th century, Є/є was also used in Romanian and Serbian. Other modern Slavonic languages may use Є/є shapes instead of Е/е for decorative purposes. Then, the letter is usually referred to by the older name Yest. If the two need to be distinguished, the descriptive name Broad E is sometimes used. It can also be found in the writing of the Khanty language.

The Cyrillic script, Slavonic script or simply Slavic script is a writing system used for various languages across Eurasia. It is the designated national script in various Slavic, Turkic, Mongolic, Uralic, Caucasian and Iranic-speaking countries in Southeastern Europe, Eastern Europe, the Caucasus, Central Asia, North Asia, and East Asia, and used by many other minority languages.