, the daughter of the late music icon #MichaelJackson
The models were photographed holding hands last month while out with friends in London.
On Monday, Jackson, 19, also posted a photo of Delevingne on her own Instagram account, simply captioning it "a r t."
Delevingne, 25, who previously dated singer #StVincent
from 2015 to 2016, opened up about her sexuality in an interview with Vogue in July 2015. She said: "My sexuality is not a phase. I am who I am."
Jackson broke up with her ex-boyfriend #MichaelSnoddy
Delevingne and Jackson first met in May 2017, at the MTV Movie & TV Awards. They have been spending time together since then.