Italy
At Alfea College, Stella, Aisha, Flora, Musa, and Tecna all graduate and become fairy guardians of their home planets. But, Bloom must watch graduation from the sidelines. The Winx try to save Bloom's parents and the planet. - IMDb
| Klub Winx - Tajemnica Zaginionego Królestwa |  Poland |
| Magija Vinks: Tajna izguljenog kraljevstva |  Serbia |
| Winx - O Segredo do Reino Perdido |  Portugal |
| Winx Club - Das Geheimnis des verlorenen Königreichs |  West Germany |
| Winx club - det fortabte kongerige |  Denmark |
| Winx Club - Hemligheternas slott |  Sweden |
| Winx club - Kayıp krallığın sırrı |  Turkey |
| Winx club - Salaisuuksien linna |  Finland |
| Winx club en het geheim van het verloren rijk (dubbed version) |  Netherlands |
| Winx Club, el secreto del reino perdido |  Spain |
| Winx Club: Il segreto del Regno Perduto |  Ecuador |
| Winx Club: Il segreto del Regno Perduto | Italy |
| Winx Club: Kongerikets Hemmelighet (dubbed version) |  Norway |
| Winx Club: le secret du royaume perdu |  France |
| Winx Club: Tajna izgubljenog kraljevstva |  Croatia |
| Winx Club: The Secret of the Lost Kingdom |  United Kingdom |
| Winx Club: The Secret of the Lost Kingdom |  USA |
| Winx Club: The Secret of the Lost Kingdom | |
| Winx club: To mystiko tou hamenou vasileiou (transliterated title) |  Greece |
| Winx Club: Výprava do strateného kráľovstva |  Slovakia |
| Winx Club: Výprava do ztraceného království |  Czechoslovakia |
| Winx Klub: Az elveszett királyság titka |  Hungary |
| Winx Клуб: Тайна затерянного королевства |  Russia |
| Клуб Вінкс: Таємниця загубленого королівства |  Ukraine |
| Уинкс клуб: Тайната на изгубеното кралство |  Bulgaria |
| ウィンクス・クラブ: 失われた王国の秘密 |  Japan |
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Keke Palmer [14] | Aisha (English version, voice) |
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1. Pirates of the Caribbean: At World's End (2007) Cumulative Worldwide Gross: $ 960 996 492 |
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2. Harry Potter and the Order of the Phoenix (2007) Cumulative Worldwide Gross: $ 938 580 405 |
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3. Spider-Man 3 (2007) Cumulative Worldwide Gross: $ 890 871 626 |
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4. Transformers (2007) Cumulative Worldwide Gross: $ 709 709 780 |
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5. I Am Legend (2007) Cumulative Worldwide Gross: $ 585 349 010 |
| ... | |
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123. Winx Club: Il segreto del Regno Perduto (2007) Cumulative Worldwide Gross: $ 16 688 332 |
