The animated family comedy has amassed $80m and heads out to France on Apr 2. It could still be under threat from Warner Bros Pictures International's (WBPI) prehistoric saga 10,000 B.C. which dominated the charts for three weeks and currently stands at $143.2m.
Meanwhile Horton's stablemate Jumper, the sci-fi action romp, has reached $120.4m and teleports into Argentina on Apr 3. The comedy Juno stands at $59m and is going great guns following its best Oscar screenplay triumph. It launches in Italy on Apr 4.
Fox International's horror film Shutter opens in Russia on Apr 3 followed by India a day later and stands at $1.8m from the early stages of release. The romantic comedy 27 Dresses has grossed more than $57.6m.
Universal will launch the cyberthriller Untraceable through UPI in Germany and German-speaking Switzerland on Apr 3, followed by Spain and Austria on Apr 4. The film has amassed $7.1m through all distributors.
Nim's Island goes out day-and-date with North America in Australia, where it was filmed, on Apr 3. The family title will face stiff competition from Paramount's The Spiderwick Chronicles, which opens there on the same day through PPI and has grossed $51.2m. Australian audiences will no doubt also be tempted by New Line International's Will Ferrell comedy Semi-Pro, which has grossed $48m so far.
Paramount Vantage's dance drama How She Move, a Sundance 2006 pick-up, launches in the UK on Apr 4, while the monster feature Cloverfield arrives in Japan on Apr 5 where it could deliver a knock-out blow to the competition. Overall the film has grossed $78.1m.
UK audiences will also get the chance to see the rites-of-passage tale Son Of Rambow, an upcoming Paramount Vantage release in North America scheduled for May 2, which opens in the UK this weekend through Optimum Releasing. WBPI will release the horror titled One Missed Call in the territory on Apr 4 and will have Icon's paranoia thriller Awake to contend with.
New Line International's fantasy epic The Golden Compass has grossed $286m and taken $27.4m in Japan, while Run Fat Boy Run stands at $26.2m and will be aiming to capture the comedy crowd in Germany and Austria this weekend.
Sony Pictures Releasing International's (SPRI) assassination thriller Vantage Point has grossed $61.3m, family title The Water Horse: Legend Of The Deep stands at $56.5m and the cheeky romp St Trinian's, which SPRI released in Australia on Mar 27, has amassed $26m through all distributors. The action title Rambo, which SPRI holds in select territories, has taken $57.2m through all distributors.
Walt Disney Studios Motion Pictures International's National Treasure 2 has amassed $234m, Enchanted is on $204.5m ands There Will Be Blood has reached $31.9m.
Drama The Other Boleyn Girl opens in France through Wild Bunch and Taiwan through CMC and has grossed $855,364 though Focus Features International's partners. The comedy Be Kind, Rewind opens in Germany through Senator and stands at $12.2m overall.