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The fantasy 3D film was initially slated for release last year but was delayed due to post-production work.
During the trip, Pranav also crossed paths with popular travel vloggers Mythili Bose and Manjit Manohar.
Last year, the couple celebrated their wedding anniversary in Japan.
Adding to the excitement, Mohanlal also treated the audience to a performance on Rajinikanth's iconic song 'Hukum' from the movie 'Jailer'.
In a playful exchange, Mohanlal asked her if she would like to accompany him, to which she initially declined.
Taking to his official Twitter handle, Mohanlal offered fans a glimpse behind the scenes of 'L360' as filming commenced.
Noted writer R Ramanand accompanied actor Mohanlal on a trek to Kodachadri in Karnataka and in a detailed online post, he shared the experiences as well.
The two have acted in several iconic films, including Thenmavin Kombathu, Pavithram, Valanakalude Naadu, Manichithrathazhu.
Chiranjeevi, Boney Kapoor, Janhvi and A R Rahman were also the other guests at Aishwarya's function.