Brooklyn Beckham surprised girlfriend Chloe Grace Moretz by turning up to watch her speech at the Democratic National Convention.

The 19-year-old actress was one of the speakers who showed their support for presidential candidate Hilary Clinton at the event in Philadelphia and she was thrilled when Brooklyn made a shock appearance before she addressed the audience.

Posting a picture of the loved-up pair on Instagram, she wrote: ''Look who surprised me !!! We are Ready to watch @hillaryclinton make history.. (Tune in at 9:18 for my speech xox)''

But if Chloe had any nerves about her speech, she certainly didn't show it as she urged all young people to vote in the elections this November.

Recalling when she registered to vote when she got her driving licence, she said: ''It took just a minute, but it gave me the power of a lifetime, the power to make my voice heard and to shape the future of our country.''

The 'Kick-Ass' star then addressed the millennials and said how important it is for them to make their voices heard.

She said: ''This November, I will be voting in my first general election. And I am excited that the very first vote I cast for President will be for Hillary Clinton! I'm a Millennial - a member of the largest generation of Americans since the Baby Boom. But nearly four out of five young people stayed home in the 2014 Congressional election. Imagine what can happen if we all make our voices heard at the ballot box this November.''

''Don't miss this chance to make your voice count. Because if you show up, if we all show up this November 8th, we can put someone who will fight for us in the Oval Office. We can make Hillary Clinton the next president of the United States.''