Tim Peake has revealed his first meal in space was a bacon sandwich.
The British astronaut said he was also glad to have found his tea bags on board the International Space Station, where he will spend six months.
In his first few tweets, he wrote he was "incredibly busy" but was "loving every minute of it".
And as well as tweeting the Queen and Sir Elton John, he posted his first photo from ISS.
He captioned it: "Seems appropriate that my first photo should be of the #SoyuzTMA19M that delivered us safely to Space Station."
Major Peake is due to speak to members of the press for the first time since docking with the ISS via a live link to the European Astronaut Centre near Cologne, Germany.
The ESA has confirmed the press conference with Major Peake will go ahead at 2.15pm UK time and last 20 minutes.