Sivertsen directed a trilogy of films based on the characters from Kjell Aukrust's Flåklypa universe, with Solan and Ludvig (named Louis and Luca in English dubbed media) being the principal focus of the films. The first film, Solan and Ludvig: Christmas in Pinchcliffe, was released in 2013 and grossed $12,313,639 internationally. The second film Louis and Luca – The Big Cheese Race, was released in 2015, and received 241,472 admissions in Norwegian cinemas. The final film Louis & Luca - Mission to the Moon, was released in 2018, and grossed $4,838,873 from 422,796 admissions, making it the second highest-grossing film in Norway of that year. All three films received positive reviews, with praise particularly aimed at the films' humour and animation, but with criticisms focused on their conventionality.[6]