Khloe Kardashian was spotted attending the funeral service of Tristan Thompson's later mother in Toronto on Saturday alongside her sister, Kim Kardashian, mother Kris Jenner, and rapper Drake.

The 31-year-old professional basketball player rushed to Canada on a private jet last week with Khloe, 38, by his side after his mother, Andrea, suddenly passed away after suffering a heart attack at home on January 5, sources confirmed to DailyMail.com the next day.

The former couple still maintain a healthy friendship and co-parenting relationship to raise their two children, daughter True, 4, and their son that was born via surrogate last year in July.

The Canadian-born sports star was seen dressed in all black as he stepped outside into the brisk weather. He wore a black turtleneck sweater along with a classic black suit for the service held at Last Days Pentecostal Ministries. 

He was surrounded by loved ones and close friends who were in attendance to pay their condolences and to also lend their support to the basketball player.  

Khloe, along with her older sister, Kim and mother, Kris, were seen amongst the large group, reported People.  

A source informed the publication on Saturday, 'They all want to be there for Tristan,' adding, 'He will always be family. It's a devastating situation for him. They want to do everything they can to support him.'  

Tristan and Khloe left Los Angeles earlier last week so the professional athlete could be with his family in Canada shortly after hearing the news of his mother's death. 

DailyMail.com understands Khloe was very close to Andrea and is keen to support Tristan during this awful time to ensure everything is taken care of.

Canadian rapper, Drake, was also at the funeral service, and was seen wearing a pair of black slacks along with a thick, black wool coat. 

Tristan's family members and friends stood by to help place Andrea's casket into an awaiting black hearse parked outside of the ministry. 

TMZ had reported around the time of her passing that Tristan's mother had gone into cardiac arrest last week on Thursday and was immediately taken to a nearby hospital. However, sources informed the tabloid that doctors were unable to resuscitate Andrea and she sadly passed. 

A separate insider informed E! News after news of her death was announced that, 'This was unexpected.' 

The source further added that the Good American founder, 'was incredibly close,' to Tristan's mother, 'and like Khloe and the Kardashian family always do, they will come together and support their loved ones in their most difficult time of need. Tristan is the father of Khloe's kids and she and her entire family will always be there for him.'

Kris Jenner had penned a heartfelt tribute on her main Instagram page to send her love and condolences to Tristan and his family. 

'I am so heartbroken by the sudden passing of Tristan's mom, Andrea. My thoughts, prayers and all of my love are with Tristan, Amari, Dishawn and Daniel,' the TV personality wrote. 

She continued, 'You were the most amazing, dedicated, devoted, and selfless mom and such a loving, kind, and fabulous grandmother. What a blessing you were to your family!!! I will miss you Andrea.' 

'I will miss your bright spirit and amazing light. Thank you for always praying for us and lifting us up and encouraging us along the way. Rest in peace beautiful angel,' Kris concluded. 

Despite their ups and downs in the past, Khloe lent all her support to Tristan following his mother's sudden death, including flying to and from Canada. The couple had started to date in 2016, and two years later, welcomed their daughter, True. 

However, the sports star allegedly had been unfaithful to the reality star during her pregnancy, and the two split in February 2019. Khloe and Tristan soon reconciled in 2020 and quarantined together during in COVID. In December 2021, personal trainer, Maralee Nichols, had reportedly filed a paternity lawsuit against Thompson earlier that same year in June. 

He later admitted that he has fathered a child with Nichols when he had been in a relationship with Khloe. The two still welcomed their second child, a son in July 2022, via surrogacy. 

Although they are no longer dating, both Khloe and Tristan still remain close to properly co-parent their children.