Q1 Chili's same-store sales were up 21.4%, outperforming the casual dining industry by 1,650 basis points. This strong result was lapping a 14% increase in Q1 last year for a two-year compounded comp of 39%. This data, along with our quarter-to-date sales and traffic trends, give us confidence we'll be able to roll over the Q2 +31.4% sales growth and the +19.9% traffic growth from prior year. Brinker delivered another outstanding quarter led by Chili's, which marks our sixth consecutive quarter of double-digit sales and positive traffic growth.
For the first quarter, Brinker reported total revenues of $1.35 billion, an increase of 18.5% over the prior year, with consolidated comp sales a positive 18.8%. Our adjusted diluted EPS for the quarter was $1.93, up from $0.95 last year. Chili's reported top-line sales growth with comps coming in at +21.4%, driven by positive traffic of 13.1%, positive mix of 4.3%, and price of 4%. We continue to see strong year-over-year top-line growth, same-store sales and traffic well above industry averages, and significant restaurant margin expansion at Chili's.
Food and beverage costs for the quarter were unfavorable 60 basis points year-over-year due to unfavorable menu mix, with 2.6% commodity inflation offset by price. It offers a compelling price point for guests seeking value while still allowing us to maintain margin profitability. Top-line sales growth offset additional investments in labor and wage rate inflation of approximately 3.8%. Advertising expense for the first quarter were 2.5% of sales and decreased 10 basis points year-over-year due to sales leverage.