diff --git a/packages/polaris-viz/CHANGELOG.md b/packages/polaris-viz/CHANGELOG.md
index 7291a8b69..a89efe941 100644
--- a/packages/polaris-viz/CHANGELOG.md
+++ b/packages/polaris-viz/CHANGELOG.md
@@ -5,7 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-<!-- ## Unreleased -->
+## Unreleased
+
+### Changed
+
+- Fill missing values for SparkLine charts
 
 ## [12.4.1] - 2024-04-03
 
diff --git a/packages/polaris-viz/src/components/SparkLineChart/SparkLineChart.tsx b/packages/polaris-viz/src/components/SparkLineChart/SparkLineChart.tsx
index 023988b62..9a48b37e8 100644
--- a/packages/polaris-viz/src/components/SparkLineChart/SparkLineChart.tsx
+++ b/packages/polaris-viz/src/components/SparkLineChart/SparkLineChart.tsx
@@ -7,6 +7,7 @@ import {
 
 import {ChartContainer} from '../ChartContainer';
 import {ChartSkeleton} from '../ChartSkeleton';
+import {fillMissingDataPoints} from '../../utilities/fillMissingDataPoints';
 
 import {Chart} from './Chart';
 
@@ -20,7 +21,7 @@ export function SparkLineChart(props: SparkLineChartProps) {
   const {defaultTheme} = usePolarisVizContext();
 
   const {
-    data,
+    data: dataSeries,
     accessibilityLabel,
     id,
     isAnimated,
@@ -35,6 +36,8 @@ export function SparkLineChart(props: SparkLineChartProps) {
     ...props,
   };
 
+  const data = fillMissingDataPoints(dataSeries, true);
+
   return (
     <ChartContainer
       id={id}