(CNN) -- Facebook announced a video-calling feature on Wednesday in partnership with Skype, the popular Internet video-chat provider.

The move comes a week after Google launched a competing social network, called Google+, which also includes a video-chatting program.

Facebook's new chat feature will show up on the site as a "call" button at the top of users' profile pages. By clicking that button or finding someone in a new "buddy list" sidebar, Facebook users can talk to each other via webcams. The company began turning that service on for millions of users on Wednesday and will add it to more accounts over time, as it commonly does for new features.

This is "the world's easiest one-click way" to chat over video, Facebook engineer Philip Su said at the news conference here. The Seattle programmer was Facebook's only full-time engineer working on development, along with Skype, a Facebook spokeswoman said.

Facebook also introduced a change to its instant-messaging service to allow people to create on-the-fly group conversations.

That move also seems to mirror a feature of Google+, Google's new social network, which is seen by some as a genuine competitor to Facebook.

A video feature called "Hangouts" lets Google+ users chat over video with several friends at once. The new network also has a feature called "Circles," which lets people organize their friend lists into groups.

Facebook's new video feature does not allow for group chats.

Mark Zuckerberg, Facebook's CEO, took subtle jabs at the new Google network, saying Facebook provides the best way for people to organize their friends into groups -- with minimal effort.

"If you think about it, it makes it so that your networking community can do the work of organizing your communities for you. You don't have to curate," he said.

He also defended the company's one-on-one video chat.

"The vast majority of video chat is one-on-one chat. ... I just think this is super-awesome," Zuckerberg said.

Facebook has grappled with privacy concerns in recent years, and Zuckerberg addressed that in responding to a question about video calling.

"Your video camera is not going to turn on until you accept it [the call]," he said.

Facebook's CEO may have created challenging expectations for Wednesday's event when he told reporters last week that the company would be announcing "something awesome." Some people following along on news sites' live blogs Wednesday said they were underwhelmed by the news.

COMMENT: I think that is very good that facebook have new features, becasue if Google+ is a competiro to Faceboook, Facebook would have to find new features to add to Facebook, so it would be better than Google+