One Hundred Years Ahead, also in English territories titled as Guest from the Future (Russian: Сто лет тому вперёд, romanized: Sto let tomu vperyod, lit.

'One Hundred Years Ahead') is a 2024 Russian teen science fiction film directed by Alexander Andryushchenko, loosely based on the 1978 Soviet novel of the same name by Kir Bulychev from the cycle about Alice Seleznyova.

One Hundred Years Ahead had its world premiere at the Karo 11 October at Arbat Square in Moscow on March 14, 2024,[2] and was released in the Russian Federation on April 18, 2024 by Central Partnership.

In the near future, Earth joins the Space Federation, accelerating progress but also drawing it into a war with a pirate alliance led by a villain named Glot.

After successfully altering the timeline, Kolya writes a warning letter for the professor to avoid his demise, ensuring Alice's family reunites.

The most popular adaptation of the book was Pavel Arsenov’s 5-episode television film Guest from the Future, in which Natalya Murashkevich played the main role.