The Mysterious Boy_
"His secret will become their adventure."
Witty and resourceful fourteen-year-old Koko solves yet another mystery - aided by his friends. One of them, Tomo, has recently moved to the city and longs for adventure. The boys notice that their new classmate acts curiously. Step by step, joined by their classmate Marijana, they unveil the boy's dark secret.
Starring
Antonio Parač, Karlo Maloča, Vanja Markovinović
Updated Feb 16, 2026
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Year context
The Mysterious Boy was released 13 years ago in 2013.
Overview
Witty and resourceful fourteen-year-old Koko solves yet another mystery - aided by his friends. One of them, Tomo, has recently moved to the city and longs f...
The Mysterious Boy is a Adventure, Family film with a runtime of 1h 25m.
CAST (9)
AP
Antonio Parač
Koko
Karlo Maloča
Tomo
VM
Vanja Markovinović
Marijana
TB
Toma Budanko
Mirko
Kristian Bonačić
Zlatko
NM
Nina Mileta
Marica
FR
Filip Ružić
Marko Lukarić
OG
Ozren Grabarić
Koko's father
DV
Dijana Vidušin
Koko's mother
DETAILS
Release
Status
Released
Runtime
85 min (1h 25m)
Country
HR
Rating
7.0/10 (6 votes)
FREQUENTLY ASKED QUESTIONS
What is The Mysterious Boy about?
Witty and resourceful fourteen-year-old Koko solves yet another mystery - aided by his friends. One of them, Tomo, has recently moved to the city and longs for adventure. The boys notice that their new classmate acts curiously. Step by step, joined by their classmate Marijana, they unveil the boy's dark secret.
How long is The Mysterious Boy?
The Mysterious Boy has a runtime of 85 minutes (1h 25m).
Who stars in The Mysterious Boy?
The cast of The Mysterious Boy includes Antonio Parač, Karlo Maloča, Vanja Markovinović, Toma Budanko, Kristian Bonačić.
What is the rating of The Mysterious Boy?
The Mysterious Boy has a rating of 7.0 out of 10 based on 6 votes on TMDB.
GENRES (2)
Adventure
Family