Ellen Degeneres and Portia De Rossi put rumours of marital troubles behind them by celebrating their sixth wedding anniversary with a message emblazoned across the sky in California.

The high-profile couple has been rumoured to be on the brink of a split in recent months, and the talk show host was even prompted to speak out to insist the story was not true, joking, "Apparently she's demanding $220 million! I'll give it to her, I don't care - she doesn't have to leave me..."

The stars put the speculation behind them by celebrating their sixth wedding anniversary on Saturday (16Aug14) with a highly-public gesture.

The Ally MCBeal actress hired a skywriter to spell out the word "Six" across the horizon, and DeGeneres posted a picture of the couple posing in front of the message on her Twitter.com page on Sunday (17Aug14), adding, "Look what my wife did for our wedding anniversary. Six!"