Tughril Beg (; full name: Rukn al-Dunya wa al-Din Abu Talib Muhammad Toghrul-Beg ibn Mikail, also spelled Toghrul I, Tugril, Toghril, Tugrul or Toghrïl Beg; 990 – September 4, 1063) was the Turkic founder of the Seljuk Empire, ruling from 1037 to 1063.