New Delhi, June 12 -- A relationship becomes official not when it begins but when the people in it decide to let a bank of photographers document it on purpose. Katy Perry and Justin Trudeau reached that moment Monday at the Tribeca Festival, stepping onto the red carpet together for the premiere of her concert film and turning eleven months of long-lens speculation into a posed, lit, on-the-record fact.

The Lifetimes Tour, the documentary capture of her Paris show, CTV News reported, with the couple photographed unable to take their eyes off each other for the AP's cameras.

The choreography matters more than it looks. This pairing has spent nearly a year as a tabloid object rather than an acknowledged couple, and a red carpet at her ow...