Lje, or Lle (Љ љ; italics: <span style="font-family: times, 'Times New Roman', serif; font-size: larger">Љ љ</span>; also called lye) is a letter of the Cyrillic script.
thumb|The letter Lje in serif and italic styles
Lje represents a palatal lateral , a sound similar (but not identical) to the palatalized alveolar lateral approximant /lʲ/, which is in some languages represented by the digraph ⟨ль⟩ and pronounced like the in "million". Compare Latvian ⟨ļ⟩, Slovak ⟨ľ⟩, Hungarian ⟨ly⟩, Portuguese ⟨lh⟩, Spanish ⟨ll⟩ and Italian ⟨gl⟩.
Lje is a ligature of ⟨л⟩ and ⟨ь⟩. It was invented by Vuk Stefanović Karadžić for use in his 1818 dictionary, replacing the earlier digraph ⟨ль⟩.