Sadiq Khan has praised the emergency services and the "heartwarming generosity of ordinary Londoners", following a "difficult year" for the city.
In his Christmas message, the Mayor of London reflected on the "terrible fire at Grenfell Tower and horrific terrorist attacks" that London suffered in 2017, but praised the city's ability to remain "hopeful".
"Amid the pain and heartache, we've also found reasons to be hopeful," Mr Khan said.
He continued: "We've seen the bravery of our incredible emergency services, many of who will be working to keep us safe over Christmas, and heartwarming generosity from ordinary Londoners helping those in their time of most need.
While for Christians, Christmas is the celebration of "the birth of Jesus Christ", for many others, it is a time to "come together with family, friends, and loved ones", the 47-year-old explained.
Adding: "During this Christmas season of hope, let's take inspiration from these examples of Christian values and thank London's Christian community for all they do to help those less fortunate than ourselves - the homeless, the hungry and the sick."
In the video set to the Christmas carol, O Come All Ye Faithful, the mayor finishes by saying: "From my family to yours, Merry Christmas."