Brad Pitt's injured knee has led to balance problems.

The 'Moneyball' actor was forced to walk with a cane for a few weeks after sustaining ligament damage when he slipped whilst carrying his daughter Vivienne and Brad admits it had made him "lopsided".

He told Access Hollywood: "I was getting all lopsided. So, I'm trying to balance out now."

Brad's also revealed his six children - Maddox, 10, Pax, eight, Zahara, seven, Shiloh, five, and Knox and Vivienne, three - with partner Angelina Jolie have been putting him under pressure to propose and he has now promised to buy her a ring.

He explained on CBS show 'Sunday Morning': "We're getting a lot of pressure from the kids. It means something to them. [They asked me to] 'get mommy a ring, so I said 'OK, I will! I will.'"

Although Brad and Angelina had previously vowed not to marry until gay couples are also allowed to, the 48-year-old has recently revealed a change of heart.

He said: "We'd actually like to and it seems to mean more and more to our kids.

"We made this declaration some time ago that we weren't going to do it till everyone can. But I don't think we'll be able to hold out. It means so much to my kids, and they ask a lot. And it means something to me, too, to make that kind of commitment."

Angelina and Brad stepped out together at the Screen Actors' Guild (SAG) Awards at the Shrine Exposition Center in Los Angeles last night (29.01.12).

The actor managed to walk down the red carpet without the need of his cane.