John Gill Commentary Luke 11:2

"And he said unto them, When ye pray, say, Father, Hallowed be thy name. Thy kingdom come." — Luke 11:2 (ASV)

And he said to them
That is Jesus, as the Syriac and Persic versions express, who directed his speech to all the disciples; for though but one of them addressed him, it was in the name of the rest: and besides, the instructions Christ was about to give concerned them all, even those that heard them before, and those that had not:

when you pray, say, our Father who are in heaven, hallowed be your name, your kingdom come, your will be done, as in heaven, so on earth ;
the last petition is left out in the Vulgate Latin; (See Gill on Matthew 6:9), (See Gill on Matthew 6:10).