Tweets on the first night of the Democratic convention surpassed tweets for any individual speaker during the GOP convention the previous week, according to Twitter. 

Popular speeches on Tuesday night were by actor Kal Penn and first lady Michelle ObamaMichelle LeVaughn Robinson ObamaMelania Trump puzzles with 'I really don't care' jacket Trump backs down in rare reversal Trump gives in, signs order ending family separations MORE, with both prompting trending hashtags nationwide. Penn, who only spoke for five minutes, tweeted a picture of himself back stage with the hashtag #sexyface shortly before the speech. The hashtag took off, peaking at nearly 2,000 tweets per minute, according to Twitter.

But according to Twitter, the keynote speaker, San Antonio Mayor Julian Castro, drove tweets to a peak of 11,503 per minute, more than any GOP speaker attained — including Mitt Romney during his acceptance speech.

The conclusion of Romney's speech last Thursday earned 14,289 tweets per minute. Michelle Obama, who concluded the evening, earned 28,003 tweets per minute with the conclusion of her speech: "My most important title is still 'mom-in-chief.' "

The Republican National Committee and Obama's campaign dueled for Twitter prominence throughout the evening, with Obama promoting tweets in the #DNC2012 feed and the RNC promoting #AreYouBetterOff as a trending topic.

Both parties were looking to grab a few of the eyes on Twitter; according to the microblogging site, total convention-related tweets sent throughout the night totaled four million.