Amanda Knox's fiancé joked that their trip to Italy might be "different" this time around - as they returned together for the first time since she was acquitted of her British roommate's murder.
Knox, Sollecito and another man, Rudy Hermann Guede, from the Ivory Coast, were accused of her murder. She is due to speak at a conference on wrongful convictions and miscarriages of justice in the northern city of Modena tomorrow.
The 31-year-old criminal justice activist was photographed at Milan's Linate airport on Thursday.
Knox, who was cleared of murdering Kercher after a long legal battle and nearly four years in jail, will visit Milan before travelling to Modena Saturday where she will take part in an event at the Criminal Justice Festival.
"I'm returning to Italy as a free woman".
"Amanda now works to shed light on the issues of wrongful conviction, truth seeking and public shaming, and to inspire people towards empathy and perspective", her website says. "Wish us, 'Bon Viaggio!"
Ms Knox's 2011 acquittal was just one step in a long judicial process of contrasting decisions before she was definitively acquitted in 2015 by Italy's highest court.More news: Sarri to leave Chelsea for Juventus
More news: National Football League commissioner Roger Goodell releases statement on late Broncos owner Pat Bowlen
More news: ICC wants commentators to be 'fair' after Holding saga
In January, the European Court of Human Rights ordered Italy to pay Ms Knox €18,400 in financial damages for failures to provide adequate legal and translation assistance during her early questioning by police.
Per the New York Post, Robinson, who lives in Seattle with Knox, posted on Twitter that, "Last time I was in Italy, I took a train to Florence, blew my money on a €100 bottle of Barolo which I drank by myself while writing a bad short story".
"Three days until I return to Italy for the first time since leaving prison".
"Thrust into the spotlight against my will in 2007, the year of the iPhone and the takeoff of Twitter and Facebook, the most intimate details of my life - from my sexual history to my thoughts of death and suicide in prison - were taken from my private diary and leaked to the media", she wrote.
"While on trial for a murder I didn't commit, my prosecutor painted me as a sex-crazed femme fatale, and the media profited for years by sensationalizing an already sensational and utterly unjustified story", Knox wrote.
In 2007, the body of British student Meredith Kercher was found stabbed in an apartment she shared with Knox in the Italian town of Perugia.
Sollecito was acquitted along with Knox, but Guede was convicted in a separate "fast track" trial and is serving a 16-year jail term in Italy.