The big news yesterday was that Twitter raised another $100 million. Today, Twitter CEO Evan Williams confirms in a blog post that the company did indeed close a new round of funding. The new investors in the round are Insight Venture Partners and T. Rowe Price. Existing investors Institutional Venture Partners, Spark Capital and Benchmark Capital also put in more money. Update: Morgan Stanley is also a new investor in this round.

Williams did not disclose the size of the round or the valuation, but as we first reported earlier this month the valuation is believed to be $1 billion.

This latest round brings the total amount raised by the company to $155 million over the past two years.